I can see it being very expensive to upgrade if you include PCIe 5.0 and DDR5, especially at the early adopters prices. When you factor in the cost of the CPU and a new motherboard…..ouch. But people will pay the premium.
I will wait to see how AMD respond, and for DDR5 to settle. The PCIe thing isn’t a big deal to me.
For me in 2022:
ddr5 ram (32gb or 64gb)
Gen 5 ssd
New mobo (probably an asus z690 maximus)
New cpu (probably the i9 12900k)
Rtx4080/4090