"No user-serviceable parts inside", and nobody qualified to work on it within a 1000 mile radius.

A big factor with this will be how inexpensive they are relative to something that's more maintenance friendly. If you can get five of them for the price of a similar traditional electric motor I imagine it might be worth planning to swap and never service yourself. Particularly the longer they tend to last.

I get it now. These will be lighter and cheaper than induction motors, due to containing a lot more plastic and a lot less metal and wire.

Nobody fixes fractional Watt induction motors. When a coil burns out (or whatever), it goes to the landfill (perhaps along with the whole appliance).