Of course there’s a speed difference, but boot times are only occasionally dealt with and only the tiny handful of people capable of developing software will ever need to compile anything.

Also worth noting that if computers had been frozen at Skylake speeds for the past decade, it’s almost a certainty that more attention would’ve been paid to performance since that would’ve been the only way to make computers faster. Countless bits of low hanging fruit in optimization have been ignored because power increases have papered over them, and cumulatively their impact is significant.