I find the cost of computing extremely affordable, even for high end stuff. Whats the amortization on a 2-3k computer over 7 years? How about if I use it 4 hours a day actively and 24 hours passively?

I have considered spending 10-30k on a computer given the recent AI craze, but the thing stopping me is that by 2025, a 10-30k computer in the AI space is going to be 2-4x better. Only in the last 1 year are we finding out the importance of absurd amounts of VRAM. I feel like the 4090's 24gb VRAM is going to age alright at best, but most likely poorly. (Not that 4090 buyers are going to have qualms upgrading to the 6090)