How is lemmyworld so stable?

At the time of writing, Lemmyworld has the second highest number of active users (compared to all lemmy instances)

• https://lemmy.fediverse.observer/list

Also at the time of writing, Lemmyworld has >99% uptime.

By comparison, other lemmy instances with as many users as Lemmyworld keep going down.

What optimizations has Lemmyworld made to their hosting configuration that has made it more resilient than other instances' hosting configurations?

See also Does Lemmy cache the frontpage by default (read-only)? on !lemmy_support@lemmy.ml

• https://lemmy.ml/post/1221008