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Firstly, it implies a new kind of consensus system, with no theoretical support. I'm not aware of any serious work covering a decentralized consensus based system that uses heterogeneity of implementations as a main or auxiliary security measure e.g. for immunity against software bugs.
What if there were special research labs running a few implementations each, e.g. GoLang, Java, Python, pure C (is there one?) with a human deciding which chain is correct? When nodes disagree with each other, they send alert to an operator on duty, operator wakes up, fires up his/her laptop, investigates and warns the community about potential split.
I have no idea how such service could be monetized or rewarded. They can get fame, using that fame for their own projects, or they can get donations from whales or from big Bitcoin businesses.