2 weeks ago, I did an update - are logging in my desktop was just black (empty). I had the Welcome splash screen, and I could launch firefox from there. But nothing else! - I rolled it back.
Last week, after my update - same thing. I rolled it back.
Last night, after my update, I can’t log in. I get the login screen, enter my details, the screen goes blank for around 30 seconds, then back to the login screen. I rolled it back…
You can download without installing by using zypper dup -d. That at least will get the packages downloaded for when the known issues are resolved, if those issues potentially affect you (they may well not).
Glad to hear things are back to normal for you. I ran an update myself a couple days ago that caught up about 20 days of updates for me (about 1000 packages total) - and I did the pre-download route myself because it was such a large update.