After 12yrs, I recently left Boeing along with at least a dozen of my peers during the 'Great Resignation'. I ended up being blessed with a 20% pay raise, full remote, decent benefits, in a much healthier company that's less burdened with egotistical management. The new company isn't perfect by any means, but I felt like I needed a change and it was clear Boeing was heading in the wrong direction, so I took the leap.
In the months leading up to my departure, it seemed like nearly everyone I worked with was either leaving, looking, or actively interviewing somewhere else. Today, nearly everyone I worked with over those 12yrs is gone - the few that remain have expressed regrets over staying, saying morale is the worst they've ever seen it and 'leadership' is completely disconnected from the reality on the ground.
Everyone's situation is different, but if you're thinking about leaving but afraid to make the leap, it's probably not a bad idea to take the risk and go. I worked with many 'bitter lifers' during my time at Boeing and it's just not worth letting that place ruin your life and mental health.