I think my experience is skewed by not having a dcfc capable car. I charge exclusively j1772. And use plugshare to find the chargers. In 5 years of ownership I’ve charged not at home probably 150 times. Of those times I would say I couldn’t get the charger to work maybe 20 times. And of those 20 probably half didn’t have any other option at the same location that I was able to get working.
Again this is skewed by filtering through plug share and not even attempting locations that have comments claiming they’re broken.