I guess the revelation for me was not that more pixels give you more options – as you say, that’s pretty obvious – but that the camera that provides them isn’t fatally compromised – for this sort of work – in other areas in order to achieve the detail.
It could easily have been – slower AF, lower frame-rate, smaller buffer – but in practice they’re all good enough – if not, obviously, best-in-class.
The large file sizes could have been a deal breaker, too. It does have a negative impact on workflow and without the ability to save RAW to one card and JPG to another, for example, it would simply not have worked for me.

Started out doing photography at the age of 6 using an uncle's old 1940 kodak brownie box camera. At 15 years of age, I decided to buy my very own 1975 Praktica SLR camera. I now shoot with a Nikon D850. I do unpaid TFP and commercial paid work.