Yeah, nobody buys a 7 series to drive themselves. The 5 series is BMW's driver flagship, IMO.
I think the Mayor of Belfast still rides in the back of a 7.
But both the S-class and the 7-series are very VERY rare luxury cars. I see thousands of 5-series and E-classes for every 7-series or S-class. The difference in price must be huge in europe compared to the US, because there I saw tons of 7-series and S-class was almost as common as E-class.