More likely is the device firmware and you likely can't fix that.
If you have a reasonably up to date mesa and use a Proton version with a new enough DXVK, DXVK can utilise Graphics Pipeline Libraries to link shaders just like a d3d11 driver on Windows would, eliminating stutter.
I believe shader precomp is used for some video codec edge cases though, so YMMV depending on the game.
No, it wouldn't make any sort of difference.
And also in any other filesystem's code or the block layers below the filesystem. As I said, unlikely scenario.
Also, their client is still open
*is open again. The clients they distributed were not open source until they open sourced sdk-internal. The fact that you couldn't even build it with only open code even if you wanted to was a bug but that's a rather minor issue in comparison.
I also fully believe that they would not have GPL'd sdk-intenral without public pressure. Even when they were originally called out they were pretty clear that the integration of proprietary code was intentional and done with the knowledge that it would typically violate the GPL.
If you don't see what's ethically wrong with even attempting to subvert the GPL, I don't think you've understood open source.
Until the situation now, this was limited to the server, not the clients. You could replace the server with Vaultwarden and build it without enterprise features. Not ideal but fine because the server isn't the critical part. It never handles your secrets in any way.
What they tried to do now was integrate proprietary code into the clients that everyone uses. This is a lot more critical as it can access the secrets in plain text.
This also wasn't a "mistake" or "bug", they openly admitted to doing this with the intention of subverting the client code's GPL.
One does not "accidentally" build a proprietary SDK for months and make the clients depend on it, intentionally violating the GPL.
They even publicly admitted to doing precisely that, defending their GPL violation with dubious claims how the GPL supposedly works.
For ~$30 a month, that's a complete and utter rip-off.
Even here in Neuland Germany you get at least decent internet with no caps for that price.
There aren't any "extra access checks" to my knowledge. It's just the same regular access checks applied to a different set of circumstances.
Flatpaks are containers. They do have a lot of holes though.
As long as the hardware functions as it should (e.g. respects barriers) and there is no software bug in the stack, no.
That's a highly unlikely scenario though. Make backups.
Hell seems to be freezing over at an alarming rate these days; climate change is getting pretty extreme down there too huh?