Priit
Active Member
It is unclear why some cars get some updates and other do not, so far seems mostly random. My car is still on 2021.4.18.2 which was applied after 2021.4.18. However for my car the newer software appears to be more problematic than the one before that. Fortunately there is always a newer version coming and within few months I hope to be on a newer version that might fix the issues that the current one introduced.It's (year).(week).(release).(subrevision)
The date part identifies when the code for the version was branched off the main line of development. The release is a sequential number within that branch of development, so 2021.3.103 is the 103rd revision of the code that was branch in week 3 of 2021.
It's quite possible that 2021.3.103 has more recent changes than some later-branched code like 2021.12.25 - for example 2021.3.105 was first seen in the wild by the Teslafi firmware tracker on 26/7/2021. Releases are not rolled out to the fleet all in one go though.
For me the updates have mostly been good but there has been 1-2 every year that have had issues like this 2021.4.18.2, the bright side is that usually within 1-2 months they move on to a next release that fixes the issues, though the release interval seems to have slowed considerably for me this year as I am on 3rd update this year, where last year on average I had one per month.