They also close with an example for Harui's show and earlier try to explain its premise too... Completely ignoring the fact that fans don't care to watch the whole show in any order, but only the "Endless 8", the 8 episodes actually stuck in a time loop.

And even making an example out of 8 episodes would be stupid, as the 8th episode in the Endless is meant to be the very final piece of the loop. It's arguable for the very first, you could in theory watch it out of order too, but it has the most setup of the bunch.

So they only cared for the superpermutation of 6.

Critically abysmal research on the article's part.