Am I the last person not to have 8.0 yet? I just got the last 7.1 update two days ago, so I must be at the bottom of the list. :<
According to ev-fw.com, it is around 10% (53 of 529 reported) so far that have it. This is just a sampling, but I consider it a fairly moderate sample size.
53 is the number of cars which reported having 2.36.108, which is the first widespread* release level 8.0.
529 is the number of cars which reported having 2.36.31, which was supposed to be 100% spread to every car to fix a security hole. Since this was only a few days ago, and it was to plug a security hole, I use it as an extremely easy and accurate approximation of the number of live FW reporters that would be likely to report 8.0 FW at this time. We are relatively lucky that a security hole got patched so few days before the release of an intensely interesting FW release, for this reason.
ev-fw.com only represents those who wish to report, so, participants from TMC, mostly.
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* 2.36.106 was the first 8.0 released, but it was pulled so fast they "hammered"** it, and didn't even use proper English in writing the note about that they were so hurried; they very effectively halted its release before it became "widespread", even disabling it in cars that had downloaded it successfully and were ready to install it (but hadn't yet done so because owner hadn't given consent), with only 3% getting it installed, and reportedly only 1.7% still not since upgraded to 2.36.108, if ev-fw.com reports are to be believed.
There is a bad precedent, which I got from reading eyewitness reports on TMC and analyzing ev-fw.com: Analysis shows that Tesla quickly sent the fix to .106 to those that installed it, 8 of the 17 on ev-fw.com getting .108 installed within a day. That is good. What is bad is that analysis also showed that many who were offered .106 but did not install it and got it "hammered" out of their car, have not subsequently been offered .108, introducing a "damned if you do damned if you don't" dilemma of what do you do if you have the option to install a known dangerous firmware in order to "lock your place in to get the fixed upgrade sooner" (some people had this option and knew they had this option --- they had the files staged while in good network range (wifi) but parked in a parking garage in bad network range (1 bar or less LTE) when it got pulled, so they could have been able to install without the pulling --- and in any case, a "rush to install" might be a statistically significant hurt level from this kind of behavior). In my humble opinion, Tesla should have circumvented this dilemma by simply pushing .108 forcefully to EVERYONE who had .106 staged or a reasonable approximation of almost done staging (some people know when their car is getting ready to metamorphose), WHETHER OR NOT they tried installing it. (Simply pushing .108 to everyone who had .106 pushed would have neatly solved that.)
** I presume "hammered" means they went after the release and pulled it back out by doing something similar to zero'ing out the upgrade files in place so it wouldn't signature verify. It might not mean that: it may mean that the MCU had a bug that made it freeze because some piece of it got "hammered" in software causing the hang bug. Doesn't really matter here to my point about the releases.