Makes me wonder what would happen with my Steam games if the publisher pulls it from the store, or what if Steam decides it won't support my system anymore (and I don't want to update).
Generally this has only happened with games that are no longer developed, but if they got yanked for any other reason I believe Valve wouldn't distribute any new patches to me.
GOG for buying stuff DRM free, and Game Pass for renting it cheaply if you don't care to own it
On the other hand, many games (by number at least) on Steam do not have any DRM and you can back up the installed files as easily as you can back up a GOG installer. Many more games only need Steamworks which is easily bypassed.
Meanwhile Valve is actively working on making Linux gaming better (which I care about) while GOG/CDPR can't even be bothered to port their own games or their store client.