I'd argue they're technically not over-driving them if the speakers survive and work well. Rather it's that other vendors are under driving their speakers by using a simplistic algorithm.

Apple is actually driving their speakers closer to their actual physical limits which are driven by average power not peak momentary power.

Actually they do over drive them. I think it is explained in the asahi sound driver GitHub which reverse engineered the Apple driver.

IIRC, there is an algorithm which overdrives the speakers in physically dangerous zones only on some frequencies and only in short bursts of time with a throttle until the next over drive if necessary.

For the user it’s transparent because we are talking about timings in milliseconds so except if you play a static frequency you can’t notice anything.

Asahi explained that they had to reverse engineer this because they didn’t understand why the sound was so bad on Linux.