My goal number had been a date, not a $$ number, for my entire career. Initially it was 58, based on becoming pension-eligible under the rules in play at the time. 58 gradually edged upward to 62 as I contemplated the ravages of inflation on a non-COLA pension.
62 became 70+ when I woke up and found myself in my early forties with the pension underfunded and my life savings consisting of a tool collection haphazardly assembled over two decades of doing home repairs. (DW and I were a paycheck-to-paycheck household, largely because that was our background and expectation; if there was money, it was there to be spent.)
Kicked savings into gear, and by mid fifties I was targeting an exit at 65 based on Medicare. Found this forum and FIRECalc, and shaved 65 down to 62. This year the death of one close friend and the ER of another have affected me deeply, so now I'm shooting for 60... and I turn 59 in a week.
Right now I'm hoping I don't lose my nerve and go into perpetual OMY mode. Also, keeping fingers crossed that a big reorg at Megacorp makes the decision for me with a comfy "get-lost" package.