Official client and support for my platform of choice is a big plus only Steam bothers to have.

Steam doesn’t enforce the use of its DRM (which is super easy to bypass anyway but that’s a side note).

Steam lets you publish your game on their platform and hand out as many keys as you like to resell on other platforms (at no cost) while still doing all the heavy lifting of hosting and distributing.

Steam doesn’t decide what kinds of titles get published on their platform any more than GoG does, so the bit about remasters, etc. is a bit weird. Besides you the user should get to decide what you want to buy and play.

I love GoG, but I love Steam as well. They’re not mutually exclusive and you can have both.

Wouldn’t Steam, with TF2, be the most costumer oriented?

On being customer oriented on the other hand, Steam could use some improvement.

GOG has DRM, they call it Galaxy.

Call me when GOG Galaxy supports Gnu/Linux.

Meh, Proton alone makes me like Steam a bit more than GOG. Itch.io is also nice, but for some shitty reasons, they have some problems with my debit card. While it is nice to support small devs, I hate to support Peter Thiel the absolute piece of human garbage with my payment.