That is a mikecomputing-style argument. I would like it therefore it would be great. But why would Sony want to do that? They are a hardware manufacturer. They want to sell units. Why would they want to damage their sales by pre-installing them exclusively with an OS that no one wants?

Pre-installing them with a popular OS but leaving them open for the users to replace it with Sailfish or Moonshark or whatever is a different thing. It does not cost them anything.