[lathiat]

Also this chip is SPECIFICALLY for FSD. Though true that current autopilot is not designed for city streets the "FSD Chip" / Telstra Computer is quite literally designed for slow city driving. And Elon specifically called out the power usage in these low speed scenarios.

Also even on the highway you're not using a lot of power in bumper-to-bumper traffic.

They also apparently had a power supply limitation in the older cars for retrofit.