As a reminder, hyperloop is a system that runs pods with passengers or cargo through low-pressure tubes at speeds up to 800 MPH. It's an idea that could work in theory, but it's never been proven to run at anything close to those speeds in practice.
Musk noted that hyperloop would be the fastest way of getting from one city center to another for distances less than 2,000 miles, with Starship being faster for longer journeys. He also noted that "underground tunnels are immune to surface weather (subways are a good example), so it wouldn’t matter to hyperloop if a hurricane was raging on the surface. You wouldn’t even notice."
In the coming years, Boring Co will attempt to build a working Hyperloop.
From a known physics standpoint, this is the fastest possible way of getting from one city center to another for distances less than ~2000 miles. Starship is faster for longer journeys.
