I would estimate upgrade less than 10 years, considering pilot age at NetJets and movement to airlines of current employees.

The lack of upgrades hopefully won't continue forever. Change tends to happen fast in this industry. But, perhaps I'm too optimistic.

Delta has a base in SLC. Just sayin'. If you went to a FAR 141 undergrad school and a GPA of 3.0 or higher you may be eligible for an interview (it seems this is an unwritten requirement for civilian only candidates).