The housing crisis is caused by piss poor land management and a lack of available buildable land due to geography. What would better alleviate the issue and lead to a better living standard would be to rezone the majority of the city to permit missing middle development rather than band-aiding the solution with this so some assholes can keep their sfd in the middle of a transit corridor in the biggest city in the province.
If you wanted to include these housing types in with the missing middle, then for sure. I could definitely see these working in certain spaces.
The bigger issue, and the same one with tiny homes is that there is no building standard. Until one gets made they will have to be built to the standard of sfd which means doors, windows, hallways, etc have to be a certain size.