Since Infocom games run on everything from a Palm Pilot to a mainframe, there's no reason for them to ever go away, as long as we can find people still interested in building Z-Machines for the latest gear.
I’ve never heard this term z-machines, but it’s interesting, and invokes in my mind a machine that does anything you need regarding z. Specifically I’m reminded of zMUD, but that might be dating myself a bit. Is this z-machine idea your own, or did you happen upon it? Can you think of other memorable or especially useful z-machines in modern usage?
zMud was a MUD client, so in some ways not so dissimilar in the sense that they both allow you to play text-based games.