Reminds me of the accidental Wikipedia dive into the "Volkswagen engine" universe I once had: apparently the design lives on in a multitude of engines in the ultralight market, for dune buggies and the like. Bootstrapped by aftermarket parts for repurposed original engines, but then complete engines appeared making use of those aftermarket parts and now it's an interoperability standard long after repurposing original engines has stopped being a thing. Distributed Theseus.