That's why you trust (or don't) the company behind the product, not the product itself. John Deere ruined their reputation for their business practices, not for using the automation.
It's just plain old vendor lock-in practiced forever and it's a market (or regulation) problem, not a technology one. I haven't yet seen a case where the lock-in was kept secret in the long run, you always have a clear signal that business practices of this particular company are user-hostile. There's nothing special about computers here either, you can always clearly tell that the company turns into shit. When a company starts doing something like this, stop trusting it. Or don't.