It seems that for some particular models of car (and/or some countries) there are quite a lot of cars still on 2023.2.12, even this long after newer versions started rolling out.
For example from TeslaFi, this is the breakdown of cars it knows about that are like mine (2021 Model 3 Long Range) in Australia:
2023.12.1 10.1%
2023.6.11 19.6%
2023.6.8 38.5%
2023.2.12 27.7%
(anything older) 4.1%
The number of cars in that cohort on firmware 2023.2.12 has only moved from about 31% to about 28% in the last week (ie only 3% have updated to anything in the last week).
For example from TeslaFi, this is the breakdown of cars it knows about that are like mine (2021 Model 3 Long Range) in Australia:
2023.12.1 10.1%
2023.6.11 19.6%
2023.6.8 38.5%
2023.2.12 27.7%
(anything older) 4.1%
The number of cars in that cohort on firmware 2023.2.12 has only moved from about 31% to about 28% in the last week (ie only 3% have updated to anything in the last week).