I like your schema. I’ve used something similar. My hosts have always been sci-fi space/time ships/stations, user accounts are characters from or Captain’s of said vessels. Over the years I’ve had a TARDIS, Serenity, Moya, Out of Bands II, Galactica, Millennium Falcon, Rocinante, etc. It’s usually whatever I happen to be discovering or binging at the time I setup the machine. For nearly a decade the TARDIS was my server/NAS because it was bigger on the inside that survived through several generations of smaller devices like laptops and raspberry Pi’s named after smaller lighter vessels like Serenity and Rocinante.
Except that none of that is accurate and leaves out the crucial detail that getting measles destroys your body’s antibody memory used to fight all the other diseases your body had already learned to fight. It also ignores the horrific and totally avoidable deaths that also resulted.