@pass_it_on wikia imo is a terrible option (ads, tracking, etc, too invasive), but i sadly am not aware of any alternatives. it isn't only for fandom stuff, there're quite popular wikis about vim and some other software, for example. when i needed a wiki, i also had access to a linux server, so i hosted it myself (dokuwiki, later moinmoin, the latter is cuter, but painful to maintain).
if selfhosting isn't an option, i'd go with wikia. it's popular and not gonna disappear in one moment.
@leip4Ier I have now moved to Miraheze, which is open-source.
I don't have the tech skills or inclination to host it myself. To me the tech bit is quite unimportant and I'd still be on Google Sites if it wasn't for the backlash on here. I just want to get on with the content bit.
A Mastodon instance for info/cyber security-minded people.