Yeah, it’s generally up to the publishers if they want to use DRM on Steam or not.

Still GOG lets you download offline installers. Then you can archive them however you please. It’s probably worth something for someone not keen on borrowing digital licenses. Only real thing you’re giving up is Steam achievements.

My experience with it on Switch is great. Couldn’t tell it apart from PC honestly and it is well suited for handheld play. Guess it all comes down to availability of cartridges. One thing with the cartridge though is that when Nintendo kills off the patch servers and you decide to play again, it will most likely be whatever version is on the cartridge (still better than no game!). Normally this doesn’t bother me one bit, but this game has gotten a lot of updates adding a significant amount of content. An archived installer from a version you actually played will probably feel more worthwhile to revisit in 15 years or whatever.