Boeing did go out of their way to make sure those "change incorporation" frames ended up in working condition and flying with customers. This spreadsheet shows

Boeing did go out of their way to make sure those "change incorporation" frames ended up in working condition and flying with customers. This spreadsheet shows what happened: https://docs.google.com/spreadsheets/d/1FH3Y2-vRUgojntPkCSJI5Pd-15rsJ1a0SFCRaT-iqgo/edit#gid=2 https://docs.google.com/spreadsheets/d/1FH3Y2-vRUgojntPkCSJI... - look at the dates in the "Load"/"Delivered" columns up to LN 19. LN 10 spent almost 8 years before entering revenue service. In Airbus's case, the equivalent might be to buy back the frames and place them with customers at a subsidy. There's definitely a marketing hit that they take when a 10 year old flagship airframe is scrapped.