I’ve never been a fan of smooth post cantis. While they did OK while in use, I never got past setting them up w/o frustration and muttered curses.
Threaded post cantis I’d be willing to consider. Don’t think I’d invest the time and effort in building up a bike with them, but might take on a complete bike if it came that way.
The only situation where I’ve been outright troubled by Canti - or any rim brakes’ performance - has been in LONG, foul-weather descents. I have a medical condition that loves nothing better than to restrict blood flow to fingers and toes. Fingers go numb and reduces how hard - and how accurately- I can pull the levers.