“640K ought to be enough for anybody.” M5 is roughly twice the speed of M1 now. It's a no brainer other than money. 4 years of wear and tear and battery cycles is also not nothing.
It's a bit like Bugatti being faster than a Lamborghini... M1 is so good Apple is still making MacBook Airs with it, and that's still better than most PCs on the market heh.