I’ve been riding since the early 90’s and remember the days when snapped chains were a regular occurrence.
I’m early/mid 80’s and it’s never been a regular occurrence.
Only time i’ve had an issue with snapping chains was a handful of (probably faulty) shimano 9 speed chains that used to fall apart, outer plates just used to pull off the pin. Eventually had all those replaced by shimano tech service, sold the replacements on and bought Campag and Sedis chains, no issue since. Never bought a shimano chain since either!
Other than the handful of shimanos that went pop in the space of a month, i’m probably on one chain snap every dozen years.