I agree this is my last purchase on GoG too.
Alright, we have been unable to play to the GoG several days after patch 1.5, not a big deal.

But the worst scenario for me is when I have switched from my Xbox version to Geforce Now 3080, I have chosen the GoG version to support the creator of the game.

Conclusion: several months later, still no HDR available on my shield TV pro with the GoG version but it is working with Steam version ...