I still don't get this. Underpowered compared to what? The lastest CPU model? Well, that's to be expected every 6 mounths or so. But from a user's point of view? No so much to be honest.
I can see how latest CPU might give some advantages to those who are dependent on computations, but other than this... no. RAM is the the only thing I've updated in the last 2 year (need all these VMs, IDEs, browser etc). Never saw CPU usage going >80%