Just throwing my experiences in too--first day I got it, it ran flawlessly. I had to do a clean reinstall of SteamVR to get it to pick up but once it did everything was fine. I played until the battery ran down without any issues.
Then the next time I played, I started getting system hard locks. Every once in a while I would get the watchdog BSOD. The hard locks were a little strange to me, so I started watching my system resources and it seemed like they were connected to the video RAM being entirely consumed.
I also haven't tried it in the past three weeks as the amount of forced rebooting I was having to do was likely to damage my system. I especially haven't tried it since the software update, and it sounds like that didn't do anything for the issue anyway.
Personally, I want to encourage HTC to start posting changelogs for the software. For as touchy and experimental as this system is, we need visibility into what's changing so we can provide actual feedback when something goes wrong, or if a patch is intended to fix a problem and doesn't.
System specs:
Ryzen 5 1600X
ASUS ROG Crosshair 6 Hero Wifi (X730)