But what if it is actually the threat of amok sentient-tool-relics left behind by the Precursors, such as (probably) the Mycon.

The Ur-Quan Masters: What They Left Behind

- Removed the alternate Thraddash storyline

I mean, I'm not going to knock your decision by any means, but I was rather curious. Why?

Just want to chime in and say that Steam Spy is not accurate. It can't get information from profiles that hide their game list, and all new profiles do so by default nowadays, making it even less accurate than ever.

Steam Charts may be more accurate in some ways, but only shows people actually playing the game. The actual purchase count is likely full of people padding out their libraries but not playing. Oddly common on Steam.

This is only a bit on topic, but I wanted to give some insight.

Steam's DRM is optional. Games can use it or not use it, and it's not required to use Steam DRM in your game if you want to use the Steamworks API. The DRM is merely a protective executable wrapper.
In games that I have worked on myself, I've managed to remove mandatory dependence on Steam and allow running of games 'DRM-free', while still maintaining the ability to use Steam features when Steam is present.

GOG's installers, on the other hand, are pretty simple. Anyone can make a comparably decent installer using the Nullsoft install system or similar packages. They're surprisingly easy to use and in many cases very flexible.
There is a GOG API that can be used by GOG Galaxy games, but it is by design completely optional, and games using that API can be run without it. Exceptions to that are generally refused by GOG's QA team.

When games are removed from Steam and GOG due to any sort of complaint, they may no longer be purchased, but existing owners do not lose access to them in any way unless the developer intentionally removes it.
That includes games that are removed permanently due to legal issues (for an example, see the copyright-infringing game Motor Rock that was removed from Steam).

However, there is one angle in which it makes a lot of sense: Steam is by far the biggest outlet for sales of PC games right now. GOG comes in as a near second.
If you can't distribute your games on those services, your sales are cut so drastically as to be virtually non-existent by comparison.
Still, their wording is a misrepresentation, even though they have very good reasons to want to avoid losing these outlets.

I hope that I haven't implied any kind of bias in my post here. I'm a frequent reader but it's rare for me to want to speak up.
I'd like to present this information as neutrally and objectively as possible, if I can. I hope I've accomplished that.

Couldn't mouse support be added in a similar way to how keyboard support is as of now?
That is, allow the user to change how the mouse is used, like this button does this, moving the mouse in this direction does this?
Just a thought, I don't know how hard it would be to implement in this way...
Although at least it would be better than the current total lack of support, for those who want it.