Must have been real short lived as they made changes. The strategy is by limiting the access you can't roll back and jailbreak it. To jailbreak iOS firmware Apple must be signing it with their servers when you jailbreak, as soon as that window closes no more jailbreaks on that version. Same way DJI doesn't let you roll back to a firmware that is vulnerable to manipulation. Even Autel does it for that matter.
That is the site I use to determine what is currently being signed, here is a screenshot just now. Back to the way it was...
If you do, be sure to do a fresh restore & install when it goes gold. Those beta's have a way of sticking in there if you just go over them with new firmware.
I am waiting as I have 3 devices to choose from. I keep different apps on them for different aircraft.
PS - you guys warm too? We are up to 60º here! Heading to the single digits tomorrow and heavy snow up to 16".