It's a chicken and egg kind of problem. But ultimately, it's where gamers go. Where we vote to put our dollars basically. If it's GoG or some other platform that becomes open source or something that works to build a good product, that's where publishers will eventually move to as well after the paying audience moves. But yeah, of course lots of big name studios will fight tooth and nail and won't supply DRM free versions willingly.

Unless policy gets instituted to force them of course.

https://www.theverge.com/policy/1013521/video-game-ownership-bill-congress-power-to-the-players-act