My PDP 11/23 still runs, both RT-11 and Fuzzball and if I fire it up with the Fujitsu Eagle with 150 pounds worth of 474 MB hard disk glory, it heats the room in the winter.
I think a Fuzzball with a GPS time source would be anachronistic, in more ways than one.
I have 4 TRS-80 model I's (my first computer), but my heart is set on eventually interfacing modern storage to the DECSYSTEM-20 in my garage. Alas, it's only a KS, but they're hard to find.
I haven't lit up the TI 99/4A in quite a while, and I really should put the boards into the 4 microVAX chassis I have waiting to be assembled.
Emulators just aren't the same.