Wildly unstable
Goes without saying, anything below was working fine with KDE4.
Autostart apps configured for .kde4 previously are now just ignored. The format totally changed: from simple symlink before, you now have to create a still simple but far more complex than before file and put it elsewhere so that KDE5 starts your app.
So most things I had there disappeared. Most annoying is e.g. Dropbox because I now can’t see if this is working (syncing, unable to connect…)
Back to CLI :
$ dropbox status
Seems like it’s because the way to integrate your app to that bar has just changed, and no backwards compatibility layer provided…
Each time my laptop goes to sleep, the network (wifi) gets disabled. The workaround I’ve found to work is to use the physical button I have to disable/enable the card to make it back working.
Before KDE5, for example for me, apps started when shutting down were restored after restart. And for Konsole, it even included restoring all the tabs, in the directory they were… That was great.
Now, it won’t save anything.
I’ve a dual-screen setup. Now, each time I log in, KDE will hang for about 30 seconds at the end of the login process. Then finally log me in and the "krunner crash" popup coming.