Earlier quoted context omitted.
I've had access to FSD Beta since like the very first version. It hasn't made any significant progress to be honest. It still does the dumbest most unsafe things at the absolute worst time. In super ideal conditions it may be ok, but for the most part, I don't even try to use it anymore.
I'm not saying you're wrong, but your assertion is wildly divergent from the experience of many dozens of people who have documented their experiences in full on YouTube. It would be interesting to hear why you think your opinion is correct and theirs isn't. I'd be genuinely appreciative of any thoughts you have.
In my experience, it does lane keeping great and going in a straight line, slowing down for traffic. But that's about it. Making turns, the overall jank is unbearable in person (it doesn't come off as bad on video, but as a driver or passenger, getting constantly tossed around is not fun), and also just the unpredictability of the system makes it unusable for anything more than a parlor trick.
You're free to have your own opinion or listen to whoever you want, but I can tell you my experience has been consistently terrible and hasn't improved by any meaningful amount over the last 18 months.