Unchecking Telemetry does not stop Tesla from sending new code to your car. I was talking about them using your car as a test platform, with new models and behaviors to "see how they work." Exactly like they are doing with vision only cars today, and like they do with many AP software updates:Go ahead and uncheck those if you want a product that's not used as a science project.
The issue is that the other elements like smart summon, lane change, etc are still in development and get changed. Tesla does not tell you these are still very much in development.As for the second paragraph, pretty much the "Coming later this year" section in the image below.
Auto wipers are still technically beta once you get the car and see it on the screen, but Tesla doesn't tell you that ahead of time.