I can't count how many hacker conventions over the past 15-20 years I've been to where someone was evangelizing a product that claims to do what you're talking about. So many of these "dead simple" "plug and play" devices. Rarely do they survive more than a year or two before those involved lose interest or give up. They have a very hard time finding a product-market fit in a market of technophiles. They never even come close to a market of normies.
- The raw idea seems easy.
- The initial implementation seems like it should be of moderate difficulty, but is actually very challenging to get even close to right.
- The long term maintenance is a nightmare, but don't worry, you won't survive long enough to worry about that.
- The infrastructure and policy implications of getting and keeping it connected to everyone else are intractable. (See https://news.ycombinator.com/item?id=38531969 for some tip-of-the-iceberg examples.)
- The raw idea seems easy.
- The initial implementation seems like it should be of moderate difficulty, but is actually very challenging to get even close to right.
- The long term maintenance is a nightmare, but don't worry, you won't survive long enough to worry about that.
- The infrastructure and policy implications of getting and keeping it connected to everyone else are intractable. (See https://news.ycombinator.com/item?id=38531969 for some tip-of-the-iceberg examples.)
And yeah, none of that even touches on marketing.