Here are the updated graphs on car spread by year. The list remains heavily slanted towards the late 2010s for the most part.
Firstly the simple overall list:
View attachment 1176148
As you can see, the list is dominated by 2017 cars because it's dominated by the huge amount of fictional cars added in GTS without a year, so I attributed them to the year of their arrival. Gr.3, Gr.3 Road, Gr.4, Gr.B and some VGTs. Beyond that you can see the list is slanted towards late 2000s, and there isn't any more 2018-2023 cars than really any other era.
However, if you filter the car list to ONLY production road cars (229 cars), you get this:
View attachment 1176155
There are more cars from most years of the 90s compared to 2021 and 2022.
Finally, for ONLY real race cars (74 cars), you get this:
View attachment 1176157
Other than the outlier of 2016, there is no real sign of recency bias. For a game released in 2022, you'd expect the outlier to be 2020 or 2021.
Finally, here is the total car list split by decades.
View attachment 1176159
So again, the domination is from 2010s models. For those wanting the very latest machinery, they're outdone by or equalled by every other decade as far back as the 60s.
If you didn't know any better, you'd probably assume this was a 2017 game which was still getting DLC in 2022.