NVIDIA Released hotfix to last weeks drivers which broke Wow / caused graphical glitches and crashes! : wow
"My general guidelines for driver updates:
Tue Jul 30 17:27:59 2019 - permalink -
Do it if there's a hot new game that just came out that will likely get performance gains(generally only pertains to new AAA releases.)
Do it as a troubleshooting method, so instead of reinstalling your old drivers you might as well update to the latest.
Do it if it's been about 6-12 months, generally issues or new releases arise before this though so reinstalling happens before this window anyways nullifying this bullet point."