A few years ago there was a proposal to Icann to create .forum top level domains. It took forever and now they are available. I have a 3 of them:
https://computerhelp.forum
https://freepchelp.forum
https://offtopic.forum
I was sceptical at first and bought those 3 because I lost the domains the sites were on when I was ill. They were cheap, $4.95 each so I thought why not.
Those domains have been online now for almost 6 months. I will say this Google loves the .forum domains. Those sites get almost double the traffic that old sites on .com domains got.
If those visitors would only convert to active users. I can dream.
What you think about the .forum doamins and all the other lesser known top level domains?
Oh, I also have a .online and .tech site, but, that's for another thread.