For me, I honestly prefer forums when it comes to discussions or sharing ideas and other important things. Like others have stated above, I find forums to be more "functional" when it comes to having a record of what's been posted and even if say, years from now, you need to find something, a simple search in the proper category will yield useful results.
One example I have personally experienced on Social Media is pre-ordering stuff from local sellers or discussing things with other toy collectors. When it comes to posting things like guides or asking for solutions, those posts normally gets buried quickly since there's a constant stream of other people talking about other stuff. Usually, topics get mixed, unlike in forums where there's a cleanly organized list of categories that we can post in. For example here, we have a place for non-sixth scale toys so anyone interested in those can quickly find information or topics they're interested in. If you're looking for guides on the skin tones of Tbleague stuff, you can easily visit the proper 1/6 scale category and find the answers there. On social media like Facebook, that's extremely hard to do because even if you search one particular group for that specific topic, a lot of the "tagged" words can be found on other irrelevant topics, making the search results a nightmare!
In my opinion, there's a huge difference in functionality between forums and social media. Forums act more like repositories of information that people can look up even years from now, while social media primarily concentrates on what's currently "hot" or "trending". Also, social media seems to be designed to promote pictures and videos, while long discussions are just secondary. It's very hard to reference anything when discussing about a certain subject on social media because other users might make their own topic to comment on your original post. In a forum like this, a discussion about a certain subject matter can easily be contained in just one simple thread.
I mentioned pre-ordering from local sellers in my area via Facebook and let me describe how it can sometimes be hard to track orders. So basically, the owner of the store posts a Pre-Order listing for a specific date. Let's say since I love Street Fighter, I pre-ordered a Figuarts M Bison toy. Unfortunately since this is Facebook we're talking about and not a proper website or at least a forum, the listing for this pre-order will get buried under months of other pre-orders. There are times I'd even forget that I pre-ordered a particular thing simply because customers don't have a record of the items they pre-ordered themselves (unless of course you manually write it down in your computer in a text file). This February, I was surprised by three pre-orders that I made back in 2019 that somehow were scheduled to be released at the same time! Holy crap, $300 worth of toys that I totally forgot about lol! This is something that a lot of people usually experience when pre-ordering from those private Facebook groups owned by local toy sellers. The reason I order from them is that their prices are definitely lower than Amazon, Big Bad Toy Store, or any other actual site on the internet, PLUS you don't have to pay extra taxes and the shipping is already included at whatever price you bought your items for. So for example, I can buy a Figuarts M Bison for $65 shipped without worrying about taxes to pay (here in California, EVERYTHING is taxed), but if I were to buy that from Amazon or Big Bad Toy Store, it'll be $75 + California Taxes (and if it's from BBTS, +$4 flat rate shipping) so at most I'd be paying $80 for it! I get to save around $15 to $20 by buying from local vendors on their private Facebook groups.
Anyway, right now I still definitely prefer forums over social media. I'm not really a social media guy. I don't post about what food I just ate, what places I've been to, who are the people I just met. I don't like those "motivational pictures" or "inspirational quotes". If I wanted to share thought provoking ideas, I'd do it on a forum where a proper discussion can be had. I simply have no reason to broadcast to the world everything about my life lol! I'm not a "celebrity", I'm just some guy who prefers sharing and reading stuff from people with the same interests as me, as in this forum.
Likes, shares, validation, those are things that don't really matter to me. Even on places like Reddit, there's no reason for me to worry about "karma" points. I think worrying about validation is detrimental to being your true self. Most of the time, when a person worries about being "liked", they have to conform to whatever it is that the majority believes, even at the cost of throwing away one's true thoughts. I remember reading some psychological article about why a lot of people on social media are unhappy with their lives or even make up fake stories that show them in all sorts of unbelievable situations, and it's all because they are fishing for validation.
Another good point I saw above is that social media is something a lot of people access on their phones and that's why nobody really wants to get in-depth when discussing things due to the difficulty of typing things. Conversations are very short or not expounded on as a result. This is so true! A personal experience of mine is whenever I have to text a customer about the status of their service. Typing on the tiny screen of a phone is annoying, especially if you have big fingers lol! Auto-correct can help, but the act of having to do it almost every time can get tiresome. I prefer typing on a keyboard because it's much easier, especially if you're a touch typist.