My workplace is probably one of the larger ones in HN (tens of thousands of people in technology), and we do CD all the way to production. We’re also extremely regulated.
I agree that we’ve been lucky though, to have great tech leadership on this. And also a very supportive business.
The regulators have not had any problem with CD or high cadence at all — because we can also show that our systems actually got more stable as we adopted CD “in spirit” and increased release cadence. Also, because we no longer do manual promotions, we’ve improved our Cyber-sec position by a lot — just one of the many advantages of automation.