Never had a problem with QR's and disks on regular bikes
Now with a fat bike 4.8" tires and 203mm rotors, it WAS a problem, dislodging the axle.
I fixed the problem by replacing the hollow QR axle and fitting it with a solid threaded axle.
Note, many wheel sets for QR bikes built today are through axle hubs with QR adapter caps, so a solid axle replacement using an adapter CAN be completed.... Assuming you can find new end caps..... which is a BIG assumption
Would I buy a new bike with a QR today?
Absolutely <explicative deleted> not.