if you've never actually driven a fast car, i'm sure it's very impressive, but objectively, it's not fast compared to its competition.
it appeals to a different crowd, the kind that wants EVs. i bet most people who considered/bought the S perf have never seriously considered an M5, E63, RS, or even Cadillac V (since we're talking American cars here). all of those handily beat the S in every benchmark.