I personally find AMD GPU support under Linux to be absolutely excellent. Only thing I don't like is the "secure processor" which requires signed and sometimes encrypted firmware to run. The older cards don't have this.
I have a RX 6600 XT and it was a PITA in many instances. Sometimes black screen at boot which resolves after GDM is started. Freezes when waking up which is an issue that come and go on Arch after each update cycle. Bizarre frame drops in games out of nowhere. Like one day I had stable >60fps but next day after a reboot with no change to the system it stayed ~15fps. This was a huge pain for almost an year after launch but I think it is stable enough by now.
At least on iGPU business Thinkpads, Intel systems still seem to be more robust with Linux. The difference isn't necessarily on graphics, just less bugs overall ranging from wireless (bt/wifi) to monitor / dock compatibility etc.
And in contrast, I find Intel support to be very buggy, certainly on Linux.