you all remember when DAG was inside the hard drive at the early days of ETH mining?, it was moved inside VRAM for faster hashes.
so, if a miner dev develops a miner to put DAG inside RAM, NVME/SSD, might still push these 4gb cards if the hashes per watt are still in "profitable" area. same thing with ASICS.
Wow this was before I started in 2016, what was the speedup of going from not in VRAM -> VRAM?
If that's the case, the next logical place to store it would be in the system RAM, upgrading that is super easy and it would be the next fastest access place..
This could be a big big deal..