Earlier quoted context omitted.
5 years is long, actually. This is not a GPU thing. It's standard for server hardware.
Because usually it's more efficient for companies to retire the hardware and put in new stuff. Meanwhile, my 10-15 year old server hardware keeps chugging along just fine in the rack in my garage.
So my homelab equipment is just 5 years old and it will get replaced in 2-3 years with something even more power efficient.