Just over 1 million of them out of over 52 million is a very small amount.Lets put this to bed you old grouchy hipsters
Auto's are faster for drag racing.
Manuals are more fun for playing with your dipstick
You can claim manuals are dying, but so far they are still humming along manufacturing wise. I know because I work in the automotive manufacturing bizz and see all of the data to support it.
Between 2015-2018 MY US cars and trucks:
52,558,654 produced
1,017,614 of them are manuals.
I use this data for analytics at my job. We pay big moonies for it. I can get super granular with it too.