>>2923826No. This is the reason. Producing image sensors is very expensive and large sensors are more likely to have defects. Camera makers make way more money producing 80 1-inch sensors (and putting them into cameras ofc) while having an output of, lets say 70 working sensors (10 with defects) than producing a wafer with 15 FF sensors and only having 9 of them fully working.
When it comes to MF, the whole good/bad sensor thing becomes even worse. Companies do not want to risk such a high chance of failing during the process of manufactoring MF sensors so customers will alwayws have to pay for the 'broken' sensors as well when buying a new NF camera.