Re: 7070 emulation
I recall getting a phone call in 2000 when IBM finally stopped supporting 1401 emulation. Guy was still depending on it, although the last 1401 rolled off the line in 72-74 (IIRC).
Impressive in these days when your phone will stop being usable in under 10 years, and be irritating to use within 3, due to "upgrades".