Both AMD and Nvidia are dumping more and more memory into their GPUs.
MI300x is 192GB HMB3, MI325x is 256 HMB3e, MI355x should be 288 HBM3e (and support FP4/6).
The professional side of things, yes. For consumer grade GPUs, despite the trends in gaming markets otherwise needing such, the values have stagnated a bit.
I'm NDA with AMD and sadly can't mention details, but I can say the future is promising.
I hope AMD cracks the CUDA Problem soon