My story-
Got hired at HP in the very early 90s. Liked the company, but got tired of commuting and our relatively poor QOL. Jumped to DL in 2000 just in time for a 4 1/2 year furlough while my buddies who stayed at HP became US then AA pilots without lifting a finger. The guy 1 number junior to me at HP is now top 20% at AA. I just broke 60% at DL.
You never know.