5m is an age in London! Most tubes arrive 1.8-3m apart at peak times (meaning average wait times of half that), and even at non-peak times it is rare to wait more than 3m. Unless on an outer branch of a line that must share its service between multiple such branches outside of the central metro area.

Most lines are having automated operation rolled out to them gradually as well; they just retain a driver to keep everyone happy. The busiest lines already are: Victoria, Jubilee, Central and Northern. The latter two were retrofits.

Notably, the Victoria line has no such doors, and currently runs more trains per hour than the Jubilee line, although this is slated to change, though it won't lead by much after the upgrade.