A YouTuber named DirtyTesla has done a series of drives over the years throughout his hometown where he's tracked the intervention and disengagement rates per mile. He often shows those numbers at the end of his videos.
If not, they might take harder and harder routes as FSD gets better. Making it look like there is less progress than there really is.
Just like you cannot trust benchmarks, Goodhart's law will kick in https://en.wikipedia.org/wiki/Goodhart%27s_law
> Any observed statistical regularity will tend to collapse once pressure is placed upon it for control purposes