I agree with you on SSDs, that was the last upgrade that felt like flipping the “modern computer” switch overnight. Everything since has been incremental unless you’re doing ML or high-end gaming.
I've had this with gen5 PCIe SSDs recently. My T710 is so fast it's hard to believe. But you need to have a lot of data to make it worth.
Example:
> time du -sh .
737G .
________________________
Executed in 24.63 secs
And on my laptop that has a gen3, lower spec NVMe: > time du -sh .
304G .
________________________
Executed in 80.86 secs
It's almost 10 times faster. The CPU must have something to do with it too but they're both Ryzen 9.I thought so too on my mini PC. Then I got myself my current Mac mini M4 and I have to give it to Apple, or maybe in part to ARM... It was like another SSD moment. It's still not spun up the fan and run literally lukewarm at most my office, coding and photo work.
This and high resolution displays, for me at least.
The only time I had this other than changing to SSD was when I got my first multi-core system, a Q6600 (confusingly labeled a Core 2 Quad). Had a great time with that machine.
I know it's not the same. But I think a lot of people had a similar feeling going from Intel-Macbooks to Apple Silicon. An insane upgrade that I still can't believe.