Because number bigger doesn’t translate to higher perceived performance…

The only compelling reason that I want to upgrade my Sandy Lake chip is AVX2.

So it is instruction set not perf, sure there will be improved performance but most of the things that are actually performance issues is already handed off to the GPU.

On that note probably rebar and PCIe4 but those aren’t dramatic differences, if CPU is really a problem (renders/compilation) then it gets offloaded to different hardware.

Not OP, but I'm on a 10 year old laptop.

Only thing I'd want is a higher resolution display that's usable in daylight, and longer battery life.