Which cards from amd are 32gb? I have only seen the 16gb cards but those were made specifically for mining in rx570 generation.
The new 6800xt versions have just come out and have been some testing done and there is some headroom for devs to work on the smart access memory for their cards.
Just heard nvidia are looking to release a Ti version of both the 3080 and 3090 to offset any advantage amd will have with this technology they have implemented in their new offerings:
https://www.eurogamer.net/articles/digitalfoundry-2020-amd-radeon-rx-6800-and-6800-xt-review