Not to dampen the mood, but much as I want / long to see progress, I'm not convinced. (I have MS R LR Raven in UK). The first and most drastic pb event I had (not long after getting the car) was coming out of a long tunnel with overhead signs, long shadows, bright sun. Really scarey. Very harsh. Not gradual slowing.
Over the months I've got used to bracing myself for harsh braking while passing curtain-sided trucks but generally these pb events seem to have become less common. Slowing for speed changes or incorrect map data etc just as random and common as ever, but not such a problem.
The other day (on 2022.12. 3.2) I did a 500 mile round trip. Every had been going smoothly for 100 miles or so, then coming out from a short tunnel in to low sun and long strong shadows had a very harsh pb event
No other vehicles around. This cr@p really takes the edge off an otherwise decent car.
When I get chance I want to look at Teslamate data. While the braking felt harsh, I believe I noticed that it triggered high momentary regen so it should be possible to pinpoint exactly where the event happened and to some extent if it maxed out regen limit.
Since Tesla werent sophisticated enough to implement blended braking, any sudden (extreme beyond taking foot off accelerator) deceleration / regen peak on a level stretch of road must be triggered by the car.