Perhaps I open Jerboa too often but in the last week lemmy.world has been down around 4 times for me, sometimes for a short time sometimes for much longer. When I was on lemmy.fmhy.ml it was only down once for me until their domain was seized and that was for the server upgrade.
You are not the only one, the last few weeks have been rough for LW.
That's why I suggest people to moving to other instances, I detailed the process in another comment in this thead (can't get the comment link to work for some reason)