Dusk: Unpopular opinion: I'd rather pay Valve 30% and put up with their de facto monopoly than help Epic work towards their own (very obviously desired) monopoly
I absolutely love their client and prefer GOG over Steam. I remember how their client GOG Galaxy is highly praised in the developer community, because it is so well designed and runs so performant. It also allows you to play any previous versions of games you own.
What has GOG done for Linux? I care about OSS and companies supporting my preferred OSS operating system. To that end, Valve continues to be a steward without peer.