Am I the only person looking forward to losing the downsides of the RADAR?
I'm 99% sure that when the car lurches down to half speed on the highway due to an upcoming overheard traffic sign on an overpass that it's due to RADAR data conflicting with the visual systems (which continue to see open road ahead.) It'll be nice when my RADAR is turned off an this stops happening.
The car is very likely receiving a constant stream of unreliable RADAR data (because most RADAR data is notoriously unreliable) and has to spend a lot of processing power determining that it's noise. Tesla very likely has tons of data showing how often the cars needs to override RADAR input (nearly all them time), vs how often RADAR provides valuable input unavailable from the video streams (nearly never.) As the vision gets better, this ratio moves towards "RADAR is pointless waste" and it makes sense to delete it.
It's better than just removing the dead weight of the unit and power draw... it lessens the processor's load, which adds up to more driveable miles of electricity not spend overriding RADAR glitches. Don't forget that FSD sucks down about 250 watts per mile. That's a much larger fraction of your power consumption than most people realize, so reducing the load spent to disregard RADAR noise can actually add up enough to be significant. (Of course, if that processing power consumed by more activity on the Vision, side, then there's no net gain, and RADAR is simply holding back Vision's ability to do its job.)