Who's getting these services now? The people with the most money. You can't just extrapolate any technology out and say "one day it'll be cheap", this is a labour-intensive process. MRI machines are not getting Moore's Lawed
^^^^ Those actually aren't the ones I remembered, there was something in between that 'DIY' stuff, and the commercial thing a few years ago. ISTR also commercial, but slightly less bulky. But can't be bothered to search for that now. (Probably something related to https://duckduckgo.com/?q=rebco+mri )
There is also commercial mobile stuff for veterinary use.
Demand. When the first 5,000 units cost a mil a piece, few manufacturers are going to go all in, especially when a product improvement could make their systems obsolete before they're finished being built.
If you had a large country like china or the us or some other big baller walk in and say, "make 5,000 MRIs to these specs and we'll buy them" then by the end that manufacturer could quite possibly crank out another 5,000 for comparative pennies and flood the market, but until someone puts a few billion on the line it's not going to happen.
