Same story here. CO Silver in 2005. Various DL levels 2007-2011, then UA onwards also initially via a match. 19 of the last 20 years spent with some airline status, living in BOS, EWR and WAS. Kept UA Plat from 2019 until last week due to Covid extensions, bonuses, promotions, credit card PQP, etc. Now lowly Silver again. Much less work travel than ever before and tend to use Amex points for personal. It was a good run. Upgrades are nothing like they were in the bankrupt 2000s, but lounges have been getting better and Precheck/Clear/Global Entry are helpful.