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It's also at risk of some teenager with a drone making an open source competitor because they are annoyed that there's no Linux version.

Ahah I actually once looked for such tool AND even started writing one. Raising two kids got the better of me!

Maybe one of your kids will keep the torch when he or she's a teenager, closing the open source cycle

An open source competitor to what? You mean like Ardupilot or QGroundControl?