Runs great on Stadia compared to PC (in my experience playing on both platforms). Google needs to make something of this. I even tried running it from Chrome on my old MacBookPro 2015 and was thrilled it worked and was a great experience.
Also, I really think that Steam is the superior platform at the moment in terms of features compared to Epic and GOG, but in this case I think it would be better to buy it in GOG since not only all of the money goes directly to CD Project Red instead of 30% for Steam, but also there's some goodies if you buy it in GOG...
Anyway, I think if you bought the game 3 times you more than make up for that 30%.