Yeah, this is a fantastic blog post but is a little inaccurate in some edge cases.
In solo around the world races like Vendee Globe, the boats are required to be fully buoyant and self righting no matter how they end up. The most common approach to achieving this is to rig a canting keel with a device that when the boat capsizes, lets the keel swing to one side, creating a weight imbalance that rights the boat. They're quite serious about it too: you don't get to race the boat unless you demonstrate it works that way at the pier.
There are hull forms (without the canting keels I mentioned) that have positive righting moment through 180 degrees. Life rafts are universally designed this way. For boats it's just not that necessary ultimately, as capsize is pretty dang rare on keel boats as a baseline. Vendee Globe et all are hardasses about it because they know if the worst happens, there's no rescue possible on a short timeline.
In solo around the world races like Vendee Globe, the boats are required to be fully buoyant and self righting no matter how they end up. The most common approach to achieving this is to rig a canting keel with a device that when the boat capsizes, lets the keel swing to one side, creating a weight imbalance that rights the boat. They're quite serious about it too: you don't get to race the boat unless you demonstrate it works that way at the pier.