I think it is protected by many moats. Personally I don't mind building and using devices by and for myself, but to commercialize them? It's going to be a huge headache, and you can bet that many companies sit on the moats for their lunch. You and I will never know which of the moats really make sense and which ones are simply BS for barriers. It's too much hassle.

That is what you want. The harder and more difficult the moat, the higher the gate for these bottom-feeder product dumpers to clear. Once you clear that yourself, you would be in the promised land.

It is hard, it is expensive, and there is a lot of work, but anything worth $10M in yearly profit is. You want to avoid any product that a Chinese manufacturer can pump and dump on Amazon almost immediately, if Amazon itself doesn't, or a product an Indian teenager can create in a few hours thanks to LLMs and compete with. You want those paths to be impossible for them to clear.