I had a pension at my last job about 11 years ago. Then not long after I left with it fully vested congress passed a law allowing companies to creatively value pensions far lower than they should have been able to and most companies “bought out” the pensions for a fraction of their value. My pension got turned to mush, then a few month later congress passed a law “fixing the glitch” after most large corps had done their dirty work. My pension would have paid out about $800/month on retirement (likely not great depending on inflation), but their reassessment made it more like $150/month which probably won’t cover a phone bill when I am retired.