imho the root of the problem is that non-mining full nodes in ETH are not paid anything. That is why people are not able to buy enough storage and compute.
There are hundreds of millions of dollars per year paid to miners.
imho, one needs to figure out a way to pay a portion of this money to full nodes, and then each of them will be able to handle 1000 times more storage. The current ETH storage is tiny by enterprise means.
If ETH 2.0 is going to have 100 chains, these chains can not be stored altruistically. Therefore, the problem of paying nodes for storage needs to be solved anyway. If this problem is solved, storage rent will simply not be needed in my view.