We went from 1708 pilots on 1/1 to 1748 on 4/1, so while that’s not exactly stellar growth numbers, we are keeping up with attrition so far.

That's much better than some have stated; some have stated that you guys are losing more than are being hired. I'll chalk it up to overdramatization.
It sounds like enough to man one new aircraft per month.

Well if they're real F9 pilots, it takes all of about 30s to look at the seniority lists but shocking scuttlebutt is always much more fun to post on APC.

It depends on how many they hired, though. At spirit, we have hired around 200 or so for the year, but only a net gain of 60. Tying up those kinds of resources to add 60 people isn’t sustainable.

48 is the max we can train a month (maybe every 3 weeks). I think we had a total of 40 Jan-March because of hiring/HR issues. That’s been rectified and have a decent pool. 44 or so started class end of March and looks like another 46 for next week. So overall not terrible. Wish it was worse to be honest leverage wise

I've flown with former F9 and NK pilots on the bus at United. They've all been great to fly with.

It sounds like both F9 and NK have ~30% 'net retention' (newhires minus all attrition). That's higher than has been portrayed on both airlines' subforums.
Barring a retirement age change (which would only offer a temporary reprieve), the hiring numbers from the big 3 plus big 2 cargo are going to continue unabated for the next decade. That demand for pilots will not decline when most regionals close shop; they will simply turn more to LCCs in order to fill their classes.

Still waiting on a class date over here. Hoping for May. Interviewed in beginning of Mar.

Like always, reality isn't as bad the the forums make it out to be.

We have been growing the seniority list every month, and been running huge classes lately.

The recruitment team is doing a Meet the Chiefs every month now and handing out tons of interview invites. Oh... and we have an upgrade bid closing today

So what does this attrition do to your CASM? :D ...J/K (it's a joke)

It's a fair question.

Used to be that the gap from 1st to 2nd year pay was so substantial that they probably didn't mind replacing 3rd year FOs with new hires but I really don't know. We upped our first year pay from 60 to 75/ hour which I suspect might curb a little bit of attrition. I'm sure it's mostly just helps fill classes, but it does appear to be working. We've got 48 new hires in training right now with another big class about to start