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But they last forever. For instance, there are still lots of single engine Piper Cubs (popular in Alaska for STOL capability) from the 1940s maintained, in use,

But they last forever. For instance, there are still lots of single engine Piper Cubs (popular in Alaska for STOL capability) from the 1940s maintained, in use, and for sale: https://www.controller.com/listings/aircraft/for-sale/list/manufacturer/piper/model-group/cub https://www.controller.com/listings/aircraft/for-sale/list/m... (Additionally, a lot of general aviation aircraft have moved to turboprop in the last few decades.)

FabHK 7y ago
It's about 500 single-engine turboprops per year. You're right, they last forever, and so the market for new aircraft is tiny. Really a vicious circle: high costs lead to low volume leads to high costs.