On the maps of where it can fly, are they using some super advanced model to give the 'odd' shapes (for example the delhi one, which is totally not just a circle projected onto the globe and then reprojected onto a map)?
Or is it just an artist impression who was given a list of cities and has drawn a dotted line around them?
Funnily of all airline companies out there you picked Delta which is not to be confused with Delta Electronics (https://www.deltaww.com/), so a Delta 4nm node is not that far-fetched.
Yes, TSMC are apparantly investing $12 billion [1] to build and maintain their new Arizona fab over ~10 years. So yeah, costs a bit more than the $200m EUV machine!
https://aircraft.airbus.com/en/aircraft/a320/a321xlr
According to a few other sites they appear to cost between 130 and 140 million. Looks like they've sold some already too.