Let me rephrase it as "Premium sedan segment would be in free fall if not for Tesla Model 3, a car that didn't exist 4 years ago". People flock to Model 3 despite it being in a less trending segment. They could have got a SUV instead, but they didn't. Sound impressive to me.

taking the lead on a declining market (while producing more cars overall) is impressive, assuming that market isn't due to be completely wiped out.