Many people hate or fear flying. Some might also just prefer the laid back, retro, travel style. Not all are in a mad rush to get somewhere.
But I guess the market might be too small for regularly scheduled trips.
Just saw a Zeppelin cruising over Woodside today. It's Sergey Brin's personal project, Pathfinder. It's a true Zeppelin, a rigid airship, not a blimp, and the world's largest air vehicle. [1] First flew in 2025, but, unlike the Airship Ventures craft we used to see giving tours over Silicon Valley, it's not flown often. It's normally parked in Hangar One at Moffet Field.
[1] https://www.kron4.com/news/bay-area/big-helium-airship-spott...