The hire cost analogy isn't really making sense to me. It's a massive downgrade and for how long?
I want to enjoy my PC, and if I didn't want to spend £750 on the GPU then I wouldn't have bought one in the first place.
Each to their own I suppose.
It doesn't make sense to me either especially when nobody knows when the new cards are coming or what their performance/price is going to be.
I buy the best card I can afford to play games, I don't worry about the resale value and I definitely wouldn't go back to a slower card.