Here's my thought process I went through when considering application to BA. I am a SFO for a typical LCC.
Now: £41k + usual fdp package
BA: £42k + usual fdp package
Now: 1.5 years to command
BA: 12-15 (?) years to command.
No thanks! Furthermore, my age (late 30's) is such that I may never get a command (a pal of mine in BA was declined because he only had a year to go.)
Furthermore, I have personally encountered some astonishing pomposity amongst certain BA captains, and I really wouldn't enjoy that.
Finally, I'd forever have a very low seniority, and would have to endure scrag-end rosters and possibly FD!
Thanks, but no thanks. Didn't bother applying. Fine for a 22 year old looking for a long career, but not very attractive for us rated people with an established career.