Yup, there’s a load of Baird workouts to offer a good progression, +3 version is blocks of 5 sets of 90 second intervals at 120% with 30 second recoveries, that’s pretty brutal.
Think the 1 minute on, 1 minute off workouts don’t keep you in a state of maximal oxygen uptake for very long but are useful at training repeatability, which is pretty useful in races like crits where you need to go above FTP over and over again with some recovery but rarely full recovery.