Did you get the 2021 facelift? I hear it's also numb to drive as all of the newer cars these days are but ofc it has the 460kw 750nm torque to remedy this. It's not as agile as the G8x..but did the G8x atleast scare you shitless when took to full tilt or is the M5 just that much scarier and aggressive?
I went cheap and bought a 2019 competition, a really good deal came up on the forums, although I had to spend a bit to get it sorted cosmetically. I couldn't justify spending 2 mill+ at the time on the facelifted F90, when the facelift has the digital display (not a big fan) and the stock exhaust is about as loud as a 4 cylinder on cold start. The rest of the car is exactly the same as far as I can tell.
To answer your q, yes the G80 can be an animal and will very easily get you into trouble. Dont get me wrong its an insane car but 90% of my seat time is normal every day driving and the G80 just has nothing to give under those circumstances. Perhaps if I knew how to drive and took it to track days my opinion would be different. I don't have to turn everything off in the M5 for it to feel like an animal and I dont want to turn the electronic help off either
The F90 on the other hand will scare you in comfort mode (or maybe just me lol), makes all the right noises and feels almost as nimble. Maybe its just me but when I sit in my F90 it still feels really special just like it did when I bought it. That feeling faded rather quickly in the G80.
If you're thinking of getting a G80 make sure you test drive in a few situations, i.e. highway blast, heavy traffic as well as some back roads. Then do the same comparison in an F90.