As a long term prospective employer you don’t have to look much further than the three airlines very varying loyalty to those recently employed/ in holding pools, and response to the challenges the wiser airline community currently face in the near to mid future.
from very good sources I understand one of the following statements can be linked to each of the OPs identified three airlines.
Airline a) cutting and carving crews with abandon.
Airline b) informing those in the hold pool they are no longer needed after assuring those passing assessment they were needed (meanwhile continuing to assess further candidates)
Airline c) securing everybody in employment and keeping promises and looking to mitigate the challenges by offering crews part time/unpaid summer leave/varying flexible Agreed options
It may be possible to determine who A who B and who C are, I also understand C also owns their own hotels, ocean liners have good loss of licence/PHI benefits as well as concessionary travel amongst many perks. If anecdotal evidence proves to be true then there’s a varying degree of loyalty to newly started/holding pool individuals
it’s fair to say low cost suits some people, but there are many benefits to a more upmarket airline that others may enjoy. In simple terms do your research in each case and ascertain how you want to be treated through your career. And how desperate you are for the left hand seat. Prob 24 months difference for the right candidate from the more basic low cost airline/ to the less low cost airline cheap and cheerful holiday/ to the more upmarket airline/tour operator.