I was likely (born early 70s) vaccinated according to the first schedule, although my parents allowed me to get measles, mumps and chicken pox. Since they've passed, I can't ask them for their exact reasoning as to why.

The 1983-era CDC schedule: https://www.cdc.gov/vaccines/schedules/images/schedule1983s....

Current schedule: https://www.cdc.gov/vaccines/schedules/easy-to-read/child.ht...

Just commenting: there is a big difference between the likely vax schedule that a 45yo of today got, and what an infant born this year or last, will get.