Had some level of "on-call" in the sense that "there's a bug with your new/recent code and customer needs a fix" or "the demo isn't working and we present tomorrow" or "checkin deadline is in 2 weeks and my code isn't ready" pressure in 20+ years in silicon valley working at a startup and 2 medium size companies. The startup had a bit more since I knew lots of sysadmin stuff so I could help at times when our main IT guy wasn't available - but he was quite good and didn't let me have root access anyway, so it's not like I could have fixed it on those rare occasions.

Mind you, I interviewed for a Yahoo Mail job that would have included wearing a pager (back in '05). And I know it's pretty common - I've been fortunate to not have that be an issue. Hoping for another ~5 years at the current job until I can retire.