For me, the perceived performance improvements have been always slower. The only mind blowing perf improvement was when I first used SSD, Thunderbolt/USB-C. The other things like RAM and CPU are hard to notice unless we are doing some computation heavy tasks like video editing.

I also notice windows starting up faster than it used to before, but I know its because of the SSDs and caching. These 20% and 30% YOY improvements are simply not worthy to invest in because the returns are negligible for me.