mm324: They don't even have the simplest/most common features, ie. right mouse button functions copy/paste, yet. Unless my memory is off(which is possible) Galaxy has been out for public usage for over two years, for progress to be so slow they either pushed it out way too soon or they have absolutely no idea what they're doing. Either way they come off looking incompetent. And to any apologists out there who will say "GOG is a small company and they don't have the resources" I say that the parent company has the resources. If they are unwilling to devote the resources to Galaxy that it needs to be done in a reasonable amount of time then they never should've started on it. The snail's pace of progress that we've seen just makes it seem like another GOG fail. (Remember the hoopla around GOG selling movies?)
I seem to recall a slightly larger company making a client like this oh, some 10+ years ago. The comments that I heard about it from even its most avid advocates were almost exclusively about how rubbish it was, about how all the features were broken or sucked in some way. That went on for
years - I don't recall exactly when the majority consensus shifted to it being ok, but it took a while. That's anecdotal, certainly, but I doubt anyone would argue that Valve introduced a fully working, complete-featured, and bug-free steam when it was released in 2003. They've had 14 years to make the client you see today.
Software development takes a considerable amount of time, particularly when it's a fairly complex project. That's something that is difficult to understand for many people who have not done any themselves (and sometimes the complexity is underestimated even by people who have)
Additionally, quality of life additions, like copy/paste etc. are generally considered secondary to actual functionality. Expect it to continue to be janky until they are happy that all the essential functionality is working to their satisfaction.