I would expect upgrade times to maybe slightly increase, then drop. If you look at the seniority list, after the AT purchase but before 2015 there was very little hiring. Also, senior FOs make great money and have great schedules, and reserve is still pretty brutal, so I'd expect more FOs to bypass. For those hired 2015 and later, 7 year upgrade could be realistic. SWA does actually have retirements that start to increase around 2023 onwards, or 5-7 years from someone hired today.