Multiseat is a bit complex under X11, but certainly possible today. What do you see as the advantages of thin clients, though?
Yes... that's the point of the discussion. They exist, but there is (or is perceived to be) lack of knowledge about their existence and how to make use of them from some newer users, either because of the push for desktop linux, or for whatever reason.
> Yet here we all are having a discussion on HN instead.
I have no idea what you're trying to imply here. I suspect maybe we are discussing similar, but ultimately different, things.
And it is not about thin clients, thin clients btw is yet another Windows-ism, it is about the concepts embedded in the unix concept that current day devs seems to either sidestep or downplay while building house of cards in userspace that poorly replicate said concepts.