Overture, the upcoming supersonic airliner, will carry around 65 passengers, travel at Mach 1.7, and run on 100% sustainable fuel, while also preventing sonic booms from reaching the ground, allowing it to fly over land.

Many qualitative claims about supersonic flight, such as that people won't pay more for speed or that the market is too small, are misleading because they don't address the quantitative aspects.

Technological advancements often start as luxuries for the wealthy but eventually become accessible to the broader population, reducing prices and improving lives.

Boom, a company funded by Y Combinator, is developing a supersonic passenger jet and made significant progress during their batch by securing a $100 million LOI from Richard Branson.

I set a lifetime goal in my 20s to fly supersonic after seeing a Concorde in a museum, and I believe the future should include flights that are at least twice as fast as current speeds.

The initial cost of advanced technology will likely be prohibitively expensive, benefiting the wealthy first.

The XB-1 is the first independently developed supersonic jet in history, and it's a prototype for a future supersonic passenger airplane that aims to make air travel faster and more accessible.

Tesla's goal is to follow a three-step process for mass-market vehicles: starting with an expensive car at low volume, then a medium-priced car at medium volume, and finally a low-priced car at high volume, with the third generation expected to be around $30,000.

Eight years after their Y Combinator batch, Boom successfully built and flew a supersonic jet, demonstrating the potential of hard tech startups.