Originally Posted by
Escargot
Gonna chime in to say retrofitting the shady eighty's with ADS-B out (see government policy & regulation) at a million smackeroos a pop may have had more to do with their retirement than guzzling gas, although I'm sure that didn't help.
I'm sure it was was gas efficiency + maintenance + ADSb etc etc. All the same, businesses innovate all the time.