I think that's entirely dependent on the workload the company is placing on their support staff. If Apple decides the techs should be handling 10 tickets at once, then the techs have a choice:

1. Tell everyone to update their shit, and close tickets if they don't.

2. Waste several hours per day uninstalling and reinstalling 10 versions of the same program.

One of these will allow you to close lots of tickets immediately, and handle the remaining ones as efficiently as possible. Yay! Good job, peon! You get a raise!

The other approach will result in a deep backlog, slow turnaround times, and lower apparent output from management's perspective. Boo! Bad job, peon! You're fired!