I've been on Neon since Plasma 5 came out and there have been a couple of annoyances like the wine dependency or the background updater recently yeeting my bootloader. I also had the issue with the black screen after the upgrade, though I was lucky to fix it within 10 minutes. After that the power buttons in my start menu were broken (how do you not notice this in testing?) and Konsole can't be launched from Dolphin anymore. At least the first one was fixed a day later.

I guess that's what I get for being on a distro that promises to deliver the most recent KDE updates as soon as they come out, but I can't help but be a little disappointed to have severe instabilities happen on an "official" distro like this.