I don't think its fair to compare an S4 and C43 to the Tesla SR+, it's not marketed as a 'performance' car. Hardly anyone buys 3 Series/A4/C Class with anything bigger than a 4-pot engine these days and the SR+ is the 'bum-basic' version. The power on the Tesla is very much an outlier and is basically because they can while adding next to no cost (upfront or running costs) to the car unlike an ICE.