Stability
There was a time when endorsements were paid for by the operator, but, in recent times this has been exploited by pilots, and flying schools encouraged this exploitation. This killed it.
Now we have pilots trying to exploit operators, and operators (big and small) trying to exploit pilots. Both try to get government money.
Bonds are becoming common, and some companies are reluctant to employ pilots who are able to be mobile. (who have qualifications and experience). Some have been employing pilots on a part time basis. This does not work well. I think contracts may become more common.
I think pilots who are about to spend lots of time and money to get qualifications that are required by an airline should seek some commitment from the airline (eg a provisional contract). They should also expect to commit themselves to that airline for a reasonable time.(eg a provisional contract)
If there are not some stabilising factors it will become just like GA has become. And if it does, why would anyone bother?
A big shakeout is occuring.