For all of you who are deferring upgrading, keep in mind that if you take your car to a service center for just about any reason they will upgrade your car to the latest version. You can ask them not to, but they will do it anyway.
I personally do not believe I've experienced the timer nag. I will be more diligent in looking for it.
Not sure which part of NoVa you're in, but I could name 2 roads in Northern Virginia that have a repeatable timed nag for me.
Every 3 minutes (I did the test for 12-minutes, so 4 times) on I-495 going south from roughly Gallows road down to I-95. Pretty sure had a 3-minute nag on I-95, though I can't remember now...
And every 1 minute after getting off I-95 onto the Fairfax County Parkway going north (after about 4-5minutes, I got tired of the nag and held the wheel).
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To be fair to Tesla, this could be an illusion. Since they reveal nothing about the control logic, any decision you see it make is pretty much magic, and anyone will attempt to find some pattern that it fits is like seeing animal shapes in clouds or the virgin mary in toast.
That's very condescending, and blatantly wrong.
I can repeat multiple times a timed nag in my car on 2 different roads, at 2 different timed increments. Someone here (boonedocks) has posted a video of his repeatable 3-minute nag.
This isn't a "well it's around 3 minutes and 18 seconds, but sometimes it's at 3 minutes and 23 seconds". These are whole minute increments.
If it happened once to 1 person, then sure, maybe he did something wrong and it's a coincidence. But when it's happening, in whole minute increments, to multiple people and each one of those multiple people can repeat the experiment multiple times, it's not a coincidence anymore.
Hands OFF the wheel will cause a nag in my car on 2 roads that I've tested it on. Hands on the wheel will not cause a nag, even gently the car seems to detect that you're holding the wheel.