[toomanybeersies]

Easier to get a few computers to automatically change their clock twice a year than every human being to change their schedule.

[asoneth]

This. Coordinating a mass schedule change is just an alternate implementation of a time shift.

The primary benefit of mass schedule change is that it might make (some) programmers' lives easier. The disadvantage is that it makes everyone else's lives harder as they adapt to schedule shifts.

(Clocks exist to serve people, people don't exist to serve clocks.)