It's in the "critical path" for certain niche applications. I do HPC operations, and every now and then, I run across some (usually commercial) scientific softw

It's in the "critical path" for certain niche applications. I do HPC operations, and every now and then, I run across some (usually commercial) scientific software application whose installer and/or configuration manager is a GUI. I am not sitting in front of the cluster head-node, I am ssh'd in to it. With X, I can just go ahead and fire up the GUI, and it will appear. Maybe a bit laggy, but as long as its only one application, it's usually good enough to complete the task I need to complete. With remote work and thin pipes, it's laggier, but "xpra" also allows per-application X forwarding, and removes a lot of the lag. Of course I could set up full VNC and set up a whole desktop environment on the cluster head node, and remote into it, and maybe in the glorious Wayland future, I will have to do that. Sometimes when I talk about this, someone in the comments says that Wayland is working on some kind of per-application forwardability -- that would be nice if it's true. I get that my use-case is niche, and so I don't expect it to be a high priority for the devs, but it's one of those things that, once in a while, is a critical link in my administrative workflow, and I'm not looking forward to the eventual kludging of workarounds. Edited to add: I have now seen the comment below about "waypipe", this sounds very promising!