Have any parents tried Elimination Communication? Basically teaching your baby to inform you that they’re ready to go, and taking them to the toilet immediately. This is something my partner wants to try when we eventually have kids. Something I’d never heard of until last week. https://en.wikipedia.org/wiki/Elimination_communication
I have 2 kids. The first I was able to stay home with for 1 year. We did what I'd call "light EC" which worked well and she was using the potty for BMs most of the time by 1 year old. She was fully potty trained by 2.
Second child: both parents are working full time, which means childcare is split between nanny & daycare. The nanny is pretty good about encouraging the potty, but EC went pretty much out the window. Daycare facility doesn't even have potties until the 2 year old room. She isn't 2 yet, but is just starting to understand the connection between the sensation and actually going.