Because most of the communities are on those 2 instances. In terms of userbase world does have the most users, but they're the exception as other "big" instances are more evenly split.

So instead of a single instance going down we have 2 main instances that need to go down, and even if they go down we'd have lemmee, shitjustworks, lemmyca and blahaj (and I guess also lemmynsfw) communities feeding the feed.

[–] gamermanh@lemmy.dbzer0.com 1 points 2 hours ago

(and db0 for the fun stuff, gosh)

[–] ghen@sh.itjust.works 5 points 8 hours ago* (last edited 7 hours ago)

I could absolutely cruise games and memes on shit just works for a day if other instances are down

[–] Voltage@lemmy.dbzer0.com 3 points 10 hours ago

I agree, having multiple main instance is better than what we had. Also thank you for reminding me lemmynsfw, time for donating.