What's the use case for a home button? Why not just set the default url for new tabs?

Engines aren't used for AC on the ground. The APU is, or an external AC unit is attached to the plane.

I fly about once a quarter and I still absolutely love even a mediocre experience. I'd say 95% of my flights are without any issues. It's been YEARS since a bad experience. I feel it's completely worth it to explore, visit friends, etc.