I don't remember the details, but in one of the recent updates they increased the performance at top speed and initial start (below 3 mph). Prior to that, 85D and 90D (all-wheel drive configuration) got a significant boost to its 0-60 performance via a software update.

Since all the hardware is controlled via a software firmware, they are able to tweak the voltage supply of each motor to decrease or increase output performance.

Power output can be fine-tuned by software even in a conventional ICE vehicle:

https://en.wikipedia.org/wiki/Engine_control_unit

Usually ECUs aren't updated online, but they can be updated by a dealer's computers.

Car was ordered with about 380HP, but delivered with a software update to unlock 428HP (Metric).