Having lived my life in and around Detroit, I have seen the good, bad, and ugly of the auto industry. Being a biologist, I have not worked directly for the auto industry. (Except when going to college.) My Model 3 is the best car experience of my life.
I remember when my biggest concern when buying a car was, will it get me to work and back reliably, can I afford it, and will I pay it off before it becomes a pile of rust. A radio was a luxury item. (My first car's radio was an AM transistor radio on the dash. Listened to the moon landing on that.)
The tear downs of the Model 3 have revealed that Tesla's motor, reduction gear, drive train, control electronics, wiring, cooling, and of course battry are the best in the industry. I assume that these will be nearly the same in the Model Y. The biggest concern is the body, which is overly stiff, doesn't take advantage of the battery case's structural properties, and is the cause of 90% of the car's problems. (Body gaps, cost, assembly) What about safety? A well designed body can be lighter, cheaper, and still have the same safety results and the current Model 3 (tank).
I personally wish I knew what the manufacturing numbers were for the cost of the above mentioned components. I truly believe that a base model Y could be produced and be profitable at under $30K.
Or Tesla could buy Hamtramck Assembly and produce a Model 3.1 Economy?
What do I know about this stuff? Just what I heard from my grandpa who started as a body man at Fisher Body in 1914 and worked in body QC till he retired in '55. (Everyone else in the family were Chrysler people.)