No, it's not all or nothing. Good engineering is simple, relies on less, and trusts less -- it doesn't require trusting zero. I also addressed the difference

No, it's not all or nothing. Good engineering is simple, relies on less, and trusts less -- it doesn't require trusting zero. I also addressed the difference in the comment -- this type of software has no end-user / operator repair, and the costs of failure are great. I know how a bike works, and I can repair it. (Time-tested materials like steel frames are also nice.) I don't know how the OneWheel works. In theory, I might be able to read some of the source code, but that counts for very little. It's certainly more complex than a bike. It also hasn't been tested over a long period of time. Well it looks like we've had a test... I haven't touched a OneWheel since I first saw them 5 years ago, and now it seems like I have some good info about them. The test of time works!