HP-75C: use in 2021?

[KeithB]

Well they *could* have tactile feel. The difference in feel in my iPhone's home button between its active and "dead" state is amazing.

As for the HP75, I guess you could hook it up to a weather station and a set of sprinklers and make a weather sensitive (don't water when it rains) controller.

You could also use it to control model trains.

Hook it up to a WiFi module and make a Twitter-station. 8^)