https://teslamotorsclub.com/tmc/threads/will-the-model-3-be-...
Though that person claims to have managed to have found a "comfortable" position with the seat moved entirely back: that doesn't fix the safety issues. I can also feel comfortable, but if I rock my head even slightly to the left it slams into the frame of the car, as the only reason my head fits is because some of the models have a divot in the top of the car.
I have a friend with a Tesla S (who is a major major fan of the company) who adamantly didn't believe me until we finally had an opportunity to go out to his car and have me sit in the driver's seat: he shut up pretty quick ;P. (He had wanted me to drive us to our destination, so as to fall in love with the car, but instead I ended up in the passenger seat with the seat extremely reclined, feeling only slightly claustrophobic.)
I'm 5'6. My wife is 5'1. When I test drove the Model S I found there was nearly 3' of foot room behind the driver seat. That doesn't really bother me, but it told me the car was made for taller people.
When my wife test drove the Model S, after adjusting the seat so she could reach the peddles, the drivers should belt went right across her neck. After 15 minutes of driving she had a noticeable red mark there. She was unhappy to say the least. We went to adjust the seat belt anchor to make the belt not cross her neck.
We were surprised that an $80,000 car doesn't have adjustable seat belt anchors. ($80K as we would have configured it)
The "salesperson" (are they called that?) in the Tesla store suggested we get some kind of cover for the shoulder belt to avoid it irritating my wife's neck. My wife was "you mean I need to jury-rig something to make this $80K car comfortable to drive?"
We've never bought expensive cars; a Honda minivan was the most we'd ever paid for a car. That was comfortable and cost 1/3 the Model S. My wanting to buy one was already stretching reasonable limits. The seat belt issue made the Model S a non-option as far as my wife was concerned.
I'm in the latter category and to this day I can't safely drive in most cars with a sunroof. Things have improved a lot over the last 20 years or so: it used to be I couldn't fit into any sedan less than full-size, whereas now many sedans other than subcompact are okay.
I am very pessimistic I will fit into a Model 3 though, especially with a car seat in back. My hope is to find a used S in a couple years.