Also, last night I updated lemmy to 0.18.5. There was only about 30 seconds of downtime.
They are hard at work on lemmy 0.19.0, this 0.18.5 release is a bug fix to resolve an issue with federating admin actions that were incorrectly being blocked by receiving servers. So you shouldn't notice any difference.
0.19.0 will have major breaking changes to the backend, with the idea of greatly improving paerformance. So expect new bugs and broken apps for that one.
It would be nice to let others go first, but it's possible apps will start updating and not work on the old version, so timing will probably be key for our upgrade.