wiki.gg is currently an excellent host, but it's still ultimately a farm owned by Freedom Games. The day will come where it'll need to give a return on investment (i.e. more ads). And it's also possible that one day, Fandom (or another large, corporate entity) will acquire it just as they did Gamepedia. Self-hosting, or using one of the smaller hosts described as "semi-independent", is the way to go to maintain self-control and not be tied to larger for-profit companies.