I know more than a couple pilots that have moved from good F100 corporate jobs to major airline positions, and a number of others in corporate positions well inside F500 that have done or are trying to do same.

I also know some F500 jobs are poaching pilots from other, good, F500 positions.

That said, it is still difficult for a light cabin guy to break directly into the 91 large cabin world.

Rising tide lifts all ships, and changing winds allow movement in plenty of directions.