If the concept is appealing to you it could also mean that Factorio itself doesn’t suit you. For example I find the concept appealing and I did put a fair bit of time into Factorio, but in the end it just didn’t click. But I loved playing through Satisfactory and I’m currently playing through Techtonica which I’m also enjoying. Maybe one day I’ll learn to love Factorio but in the mean time there are other factory builders that I’m enjoying.
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.