I wonder if Elon has solar on his houses.
Turtle, I had a 40 year career in Business Aviation and your fuel burn numbers are correct. There actually has been huge amounts of work on low smoke/ low nox combustors for years. Lots of work on the fuel nozzle side as well. There actually are mandated targets for emissions just like noise.
I will say having been around many owners that the jets become a car, just hop in and let’s go.
One of favorites, we flew the owners from the Bay Area to Tahoe for the weekend, brought the plane home and just closing the hangar when I get a call that housekeeper is bringing the wife’s favorite pair of jeans out to the airport and we need to fly them up. Off we went.