Dude, it plays Crysis?
I retired from a 2008 rig late last year. It didn't seem slow, and to be sure the Q6600 was no slouch in 2008. I wasn't really looking for an upgrade.
But I had an opportunity to score some gear in exchange for not very much work. So: i3-6100, whose on-die GPU was on par with the performance of the huge, silly-thirsty Radeon card from before. 8GB of DDR4 was cheap at the time, and so was a B150 motherboard with caps that should outlive me.
I also took the opportunity to downgrade from a 750W PSU to an efficient Season unit (270-ish Watts).
It is stupidly fast compared to what I was using before. It sips power and runs essentially silently under load with stock cooling. The room it is in is no longer self-heating, and though it is hard to make a study of because I also changed houses, I feel that it has just about paid for itself in electrical expense in this short time.
It was habit forming, of course: I then discovered the joy of real hardware virtualization, which wasn't possible before. It then grew a separate, modern (but low-end, efficient) GPU and another 16 gigs of RAM.
Now I run whatever operating systems I want, concurrently. I did not expect to be doing this, but it's fun.
I'm amazed at how far hardware has come since 2008.