8-car working on all-stations Aire/Wharfe services will be some way away.Generally speaking to all of us on here, although this may be in the long term, what do we do when the peak services reach capacity after being lengthened to 6 cars ?
Don't forget this is only 2 more carriages than the existing 4 car sets that as we know are already stretched to capacity!
There comes a time when commuting levels stabilise because there are finite numbers of dwellings in a given area.
At that stage you look further afield and a different area takes the strain.
It happened with Airedale around 1990 (I lived in Cononley, the station had just reopened); it happened in the mid 60s SE with Longfield, Rainham, Staplehurst, Fleet etc (I lived in 30s London suburbia then!)....