I’m pretty well positioned to comment on FSD Beta V12.3 because I have been driving nearly every day 99% of the time with FSD Beta for about two years in my Tesla Model 3 with FSD hardware version 3.
The Tesla V12 software update is introducing what Musk has been calling ‘end-to-end neural nets’. The biggest difference with previous FSD updates is that the vehicle’s controls are now be handled by neural nets rather than being coded by programmers. Also, for the first time, city and country driving are handled by the same system.
With V12, you have the option of setting any speed you wish, but the software determines a safe speed depending on local road and traffic conditions. In practical terms, you can set your speed at 5, 10, or 15 mph over the speed limit. However, for city driving, the software limits your speed to 2 or 3 mph over the speed limit.
I would expect this limitation of FSD Beta V12.3 to be removed in one of the next updates of the software.Hurrah! V12.3 slows you down just the right amount for speed bumps