With die shrinkage struggles is it better to purchase 3nm and hold?

Hi all,

Currently the 5090 is made using 5nm. 9070xt is made using 4nm. 3nm chips are expected to be used with the 6000 series.

After that, progress is going to drastically slow down in terms of die shrinkage. We can only expect a small uplift in performance after 3nm chips are released because it'll take forever to get down to 1nm and even then it's not likely to be a huge difference past that point.

I'm currently still using the 1080ti which is good enough for my resolution (ultrawide 2560x1080p) but I really would like to upgrade and I'm waiting on the best one to invest in so it had me thinking about the future of GPUs.

5090 was a disappointment.

I think if I purchased a 6090 there might be a possibility that I won't need to upgrade my GPU ever again (pending software support)? Would that be the case? Or instead of shrinking chips further do you reckon they're just gonna make bigger and bigger GPUs to make sure the performance keeps increasing?

What do you think about the future of GPUs? Will there come a time where there's no point in buying a new GPU because you already have one built with 1nm process and the next generation is 0.98nm? Could you hold onto your 1nm gpu for 20 years after that? What comes next?

Cheers