I don't think it's likely. The real migration has been and will continue to be towards Discord servers and similar "smallish" live chat-based communities on centralized services.
The age of small self-hosted forums is unfortunately behind us, and I don't see them reviving any time soon.
Forums work just fine. You get to have your own community with your own rules on your own website with your own advertisement. If it helps you can also make your own tools. For local communities they are also amazingly fast.
Those Discord servers, even if hosted by centralized company are community run forums. You can set "your" server to be invite only so you can filter who gets in.
The underlying software is not really important, it's what you can do with it.
The age of small self-hosted forums is unfortunately behind us, and I don't see them reviving any time soon.