StingingVelvet: In any event, GOG has made such a huge deal out of being DRM free and the client being optional there's no way they could go back on
that.
Depends what you mean by "that", I can still see some room to argue e.g. "we meant that you don't need an online client to run your games, we never meant you wouldn't need one for downloading your games, after all a web browser is a client too".
So at some point, in the distant future in a
galaxy far far away, I could see them having a system that you do need to download your games with an official client, but there'd e.g. be an option to backup your games as zip files, or the initial download itself would be a zip file (+ an install script maybe) that the client would use anyway if you let it also install the game for you.
Depending how they'd implement it, I might even be fine with such an approach. All I care is how easily I am able to download my games to my local archive, in a format that I can easily "install" and play them later on another system, without having to re-validate them online or be online at all. It is less important to me which kind of client I can or have to use for that process, be it a web browser, the old GOG Downloader client, Galaxy, gogrepo.py or whatever.
If, say, Galaxy would have an option to download all your GOG games in nice tidy zip files in one swoop, and even have optional peer-to-peer technology for the downloads... hell, all hail Galaxy! I'd be all over it. But for now, Galaxy doesn't offer any real benefits to me how I download, install and play my GOG games.
RawSteelUT: Worst case, you'll get a game whose desktop shortcut will open Galaxy if you have it on your machine, and that's easily solved by going into the game's folder and making a new shortcut using the executable.
That is the only reason why I don't have Galaxy installed. I don't want it to launch itself if I merely want to play some GOG game by clicking on a shortcut, nor I want to go through the trouble of manually creating new shortcuts for all my installed GOG games. I'm not even sure it is really that easy with all games ("just create a shortcut to the game executable"), e.g. games which use some 3rd party programs to run the game, like DOSBox or ScummVM. Then I'd have to inspect the original shortcut how it is handled, try to copy that to the new shortcut without the Galaxy bit, etc...
Nah, I'd rather just not have Galaxy installed for now, since it wants to run whenever I just want to play some standalone GOG game.