by Ridgefielder
rohr turbo wrote: ↑Fri Feb 12, 2021 4:55 pmMy general point is that stuff like rolling stock or airliners has a multi-decade lifespan in the private sector, too-- Amfleets wouldn't have been replaced 2x over since 1975 even if they were owned by, say, Kansas City Southern.Ridgefielder wrote: ↑Fri Feb 12, 2021 2:43 pm ...there are plenty of Boeing 737's and such from the 1970's that are still flying.Actually no 1970s era 737s have flown in US scheduled passenger service since 2008 (Wiki). Possibly a handful might still be flying in 3rd world countries. Mechanical systems eventually wear out and need replacement, especially if passenger lives are at stake.
As for public sector well... ponder the B-52.