Or you keep going with what you've got. Whether it's 1, 2, 3, 4 or more generations old. If you don't have a PC/GPU there's always the 2nd hand market.
Keep lowering the details and/or resolution (or for most, let the game handle choosing the gfx settings itself).
I don't think anyone is forced into paying the prices nVidia is asking this gen. As evidenced by plenty of us not buying and still playing the odd PC game
Of course the continual gouging does make consoles more attractive. Quite a few of us will also have PS5s or whatever, as it's not an either/or thing.
It must be fairly obvious to game developers when people stop upgrading and keep using what they've got. So they in turn would adapt to whatever the average gamer is using (if they want to sell anything).