Might be a good move

It's probably a good move for those seeking a windows-like environment where everything is tightly coupled. However, there are people whose first move from windows to linux used to result in "wow, that's fantastic, now I can observe, understand and tune everything, nothing's magically happening in my back". I remember my rare encounters with GNOME being among the ones giving me the strongest headaches, precisely feeling like I had absolutely zero control over the machine's behavior, and anything I took for granted based on well-established config files was no longer necessarily true in that world. But there's definitely a public for this, and making it official is not a bad thing. Users might split between those seeking again a bit more understanding and control, and those seeking a windows-like experience. There has always been two populations anyway. Maybe it will be the opportunity to officially describe it as "a graphical interface for systemd" to clarify the situation.

By the way reading some of the horrors in the description about the "need" to create users on the fly reminded me that some people long ago said that systemd tried to address the ultra-rare races where a pid could be reused and you kill the wrong process. But thinking that together they'll now be emitting uids on the fly for the purpose of dealing with multiple sessions... that's beyond me! What could possibly go wrong when using dynamic IDs? Will the next step require all users to have sudo permissions to be able to exchange files between sessions? Also I've been using multiple X sessions each with its own window manager for decades without having to handle multiple UIDs, so it looks to me like the whole monster has become so complicated architecturally speaking that new concepts have to be invented to circumvent previously designed problems... That's probably a never-ending story.