What does that gain you? I'd rather my stuff be inefficient, feature rich and cheap. Remember, your "simple" device is someone else's "missing critical feature

What does that gain you? I'd rather my stuff be inefficient, feature rich and cheap. Remember, your "simple" device is someone else's "missing critical features", your 80% isn't someone else's 80%. If I'm a manufacturer, why would I spend hundreds of engineering hours designing my widget to be efficient enough to run on an arduino when I can spend 50 cents more per widget and use an esp32 and not have to worry about investing so strongly in computational performance for computational performance's sake. If I'm a consumer, I care about the cost of the device, and the manufacturer spending hundreds of hours to make the software more efficient is almost always going to be more expensive than a different manufacturer that spent 50 cents more on hardware and much less on R&D.