Clearly you have zero idea what is going on here. None of this is threshold pace in the way you think it means. It's a mixture of paces from 10k pace up to around 30k pace, maybe even up to marathon, depending on the length of the reps.
If you had read the thread, you would have seen covered multiple times that there is no magic formula and the creation of enough load, will equal what is happening here. But take sirpoc bike example. Between 2-3 hours a day every day for months at a very easy pace, to create the same load and same result he could in half the time with a mixture of sweetspot. You probably could achieve the same results with less intensity, but take longer doing it. But what on earth is the point? Literally the whole point of this is to maximize the most amount of load you can, for someone who has a limited amount of time, but also who can maybe give a decent amount of time for their week. It's amazing to me that still people don't understand this vital concept of this training method sirpoc has laid out.
It also seems simple, but the dedication and discipline to carry this out is way above what people make out on this thread.