Most hobby communities in my spheres of interest have been subsumed into Discord. It is yet another silo, but it does feel lively. I don't think I'm contradicting you here, I just feel less negatively about it.
I'm never going to stumble across an interesting tidbit of information on Discord while browsing the web.
And even when you do have access to a particular server, you'll often struggle to find something posted a while back, even if you know exactly what you're looking for.
I hate Discord with a passion.