User base will not be split. Those people that wanted to leave Twitter, already left. And those that have no objections to the Regime, are still there. MikroTik is just going to where the users are / will be anyway. Social networks are not a replacement for the forum. They are just additional information channels for people that are there.
You completely missed my point. Let me give an example. Forum users A, B, C, & D are all very active and helpful members here on the forum.
You create a facecrap group and forum user A loves facecrap and moves over to almost exclusively using facecrap and almost never uses the forum any more. Then you create a discord channel and it turns out that user B lives and breathes on Discord so user B almost exclusively moves over to using Discord. Next you create a Mastodon channel, and user C moves over there and largely leaves the forum.
The result of that is that forum users A, B, and C are no longer available to provide help here on the forum. A new user comes onto any one of the platforms and asks a question - but the ideal person to answer that question lives on one of the other platforms, so their question is either not answered at all or is answered poorly. That's what I mean by the user base is split.
I have seen this exact scenario in several other devices or software that have user support forums. Far better to keep everyone in one place.
BTW, if you decide to move everything to one social media platform, there are many people who ABSOLUTELY WILL NOT go there. That means that they can't get support for their products, and almost certainly will eventually "ditch this crap I can't get support for". Forums may not be ideal, but generally they don't have the "I can't stand [fill in whatever social media platform you want]".