Highly recommend reading Stealth War if you want to understand China. I have a better understanding of China, and much less understanding for weird US posture as a result.
I have a model Y 7 seater, it's actually not bad in the third row. Kids totally fine, small adults for short trips. Over six feet would hit the roof though.
For the people in the back: intramuscular vaccines do not precent viral reproduction in your nose, meaning you can still spread a virus. Only nasal delivery prevents it. We need nasal boosters, not more intramuscular shots.
For the people in the back: intramuscular vaccines do not necessarily reduce viral load in your nasal passage but do make it much harder for the virus to reproduce in worse places. Nasal vaccines would do this which is why we need them for covid.
I don't think the universe has reached some kind of natural ceiling on unhappy customers so in terms of startups, no. Plenty of unhappy customers out there!