I dunno, seems like with how much RAM we have these days, an alternative to constant SSD streaming would be loading up everything there. If anything, I think consoles like the PS5 are going that route with SSDs because their RAM capacities are going to lag behind gaming PCs. 16GB in the PS5 is already arguably skimpy compared some PC builds these days. Can't blame them as they've got a price-point to hit.
I doubt developers would miss an opportunity to make use of the massive amounts of RAM on PCs in the future. In a few years, most of us will be sticking 64GB or more in our systems as the minimum, most likely. Obviously an SSD would definitely help initially loading all that stuff to RAM compared to an HDD, but I see the SSDs on upcoming consoles as overcoming a memory limitation that PCs don't necessarily have.
I doubt developers would miss an opportunity to make use of the massive amounts of RAM on PCs in the future. In a few years, most of us will be sticking 64GB or more in our systems as the minimum, most likely. Obviously an SSD would definitely help initially loading all that stuff to RAM compared to an HDD, but I see the SSDs on upcoming consoles as overcoming a memory limitation that PCs don't necessarily have.