the problem is that most of these are horrendously oversized for private use. So I would like to have a commercial agitator to create yeast dough; these aren't even that expensive for their small series and local production - compared to e.g. kitchen-aid stuff -, but I both don't have the space/floor to put down a 4sqft/1000 pound appliance and I certainly don't need a 5 gallon bowl for my dough... I'm sure you could create and sell a home-sized variant of these, but yeah, distribution won't be easy.
I have to admit though that I sometimes dream of setting up a company, which just goes through all these relatively low-tech, electromechanical things and cyclically produces these. Problem is: it's capital intensive, low-margin, low-growth and requires you to keep people around. At this point you've lost everyone nowadays even if it is sustainable (nothing goes to waste when making these repairable) and keeps skills alive (which both the US and EU are paying extreme prices for through the military acquisition procedures).
In this vein I also suspect that most people could easily afford to get their whole furniture sourced in a "raw wood" edition (to be painted/oiled) from local woodworking shops, as the price difference is virtually nonexistent (built a bed with the help of friendly non-CNC-shops: was 12h of work, which clocks in at maybe 900USD. Material was 300.). If I go to a non-ikea, but industrial/imported furniture-store, similar quality would have cost me ~4000USD. But of course, a healthy ecosystem of woodworkers and designers would not concentrate wealth.