@indigo In Australia, or more specifically the state of Victoria, buses have a lifetime of 25 years. If they're to be used for passenger transport past that date, they have to be rebuilt from the chassis up, essentially rebodied. A friend used to drive school buses in the early 2000s, one he drove was a 1955 AEC beast rebodied in 1980 & called a Leyland. It still had the original 9.8-litre slanted 6-cylinder diesel engine from 1955 and a steel steering wheel. He always had to wear gloves when driving it as the wheel would be horribly cold in winter & searingly hot in summer.
// @larand @kdfrawg