Comment by prmoustache

> I think they are. Not all knowledge is captured in documentation and blueprints. A lot of knowledge existed only in brains of now retired people. And even blueprints are lost when companies go out of businesses.

We are talking implementations details to build the slimmest walkmans made in history.

That doesn't mean we couldn't make a much better sounding tape player protoype and still a slimmer one than the We are Rewind player and what is available today on Amazon, then iterating on making it smaller and smaller over the models. The main issue is still money and market, you can't spend that time on iterating and improving the design if the market is small and you are losing money.