The impression I've had for a long while now is that just as the software side is fragmented so is the userbase in what they want, including a segment that want one true way and all that fragmentation to go away. The trouble I see with catering to all that variation is it's putting an onus for more work on the developer (which needs funding from somewhere, most likely the publisher) and while linux (and GOG) is a niche market in the present and near term it doesn't seem like a winning proposition.

There's definitely a desire for an appliance/console like experience where all the complexity is hidden behind install/play buttons, and steam has got most of the way there. As protondb shows that can't go all the way and tweaking is needed owing to the shifting PC compatibility in general and running software from one OS on a different one, it's the nature of the beast. Personally pushing towards monoculture on an open platform needs to be tempered, and there's a lot of debate previously for other places where that's relevant.