There are threads - perhaps not here so much but on Reddit and other platforms - where power supplies got crushed by 6800XT and higher cards but should have been able to handle them. I believe, but am not sure that typically it was multi rail PSUs that had the most issues. I'll be honest and say that I don't even really understand how that works, but some part of the PSU wasn't able to handle the quick changes demanded by the newer hardware.
As I mentioned before, my BitFenix 650W gold PSU was/is A tier rated on that LTT list *but* has an asterisk/got demoted as it has issues with current gen, spikey cards. Specifically 6800XT and higher.
@igor_kavinski discussed his 750W Seasonic mistrust as well.
I used to be Seasonic all the way, now all the real PCs save my gaming PC (RM750 is on the shelf, ready to go) are running Corsair Gold PSUs. They've yet to sour me, I've had bad luck with fan noise and coil whine on their lesser models though.
Personally, I used this PSU on a 3090ti build and was quite impressed with it:
I mean, the platinum is only $30 more and when we are dropping this kind of money that seems like a step I might take.
I am pretty sure the RM850x would be plenty and with a $70 savings I might just stick with that. Plus, I could that 850W one in an hour and get instant gratification.