one part of the equation (a smaller one mind you), is that many towers use to be up / down approach controls/towers...the radar guy downstairs, tower guy upstairs.
but then some genius said, lets put all the tracons in one big room. fine
except the guy in the local tracon now had to commute to a distant facility. so he wanted to maximize his work time, with minimum sleeping breaks/off duty times.
same thing happens to airline pilots...my airline use to have three domiciles in california...now none, nearest is in the deep south.
more commuting, more snoozing...
FAA ...not impressed with you!