> The mystery to me is that AT shortages have been known fora. while now, so why haven't many more trainees been recruited?

ATC has been a shit career prospect for a while now so no one wants to enter training.

For one it requires uprooting your entire life to live near a training center, then they send you on an apprenticeship to a random airport in the country for a few years. And since there are only so many slots in the desirable metros, most people get sent to live somewhere “undesirable” to say the least.

For two, while trainees get paid they get totally fucked during government shutdowns. Many who make it to the funnel also quit at that point. Without fundamental structural changes to how they’re trained and paid at the political level, the number of trainees will remain small.