[PC] Game hard crashes after 20-30 mins gameplay

This is definitely NOT a hardware issue!

If you check steam forums or right here (DATV crashing), you'll see numerous occurrences of this issue - on PC with various hardware configurations (nvidia, amd, ...) and consoles (xbox, playstation) as well.

The hard crashing is NOT happening with other titles - which also strongly implies that its a problem with this very game.
The issue has been present since launch, and has not been addressed in any of the 5 patches.
Since the development team seems to have been disbanded almost entirely (which I'm sorry for), it seems unlikely that it will ever be fixed. This is very unfortunate, as the issue prevents to play the game properly.

The issue might most likely be with VRAM management - which should have been fixed/patched after such a long time - but, alas, this ship seems to have sailed already...

Lowering the graphics settings severely and especially turning off "strand hair" mitigates the issue a little bit, but not to an acceptable degree.
Interestingly, there's a fix for linux/proton which addresses a VRAM issue with respect to "strand hair":

"Hair strand shaders write to a UAV, then read it back in the same workgroup, but misses a device memory barrier in places, leading to GPU hang"

Please see "Add workaround for Dragon Age: Veilguard." for vkd3d-proton - https://github.com/HansKristian-Work/vkd3d-proton/commit/45e44534e9eebfc53dfbc84479af22a5f49f3517

Steam won't refund my copy, because my "play"-time (as in trying to fix the issue) has been too high...
With that and no prospective fix, I, as a customer, am basically f.. screwed.