I guess a whole 2 year long period covering Wing and X. But X is immediately followed up with Turn A, one of the best entries.
Early 2000s also had some mid OVAs and the controversial at best SeeD and SeeD Destiny.

I would also read that essay.

I respect FFVIII being omitted from the list.

You feeling okay?

Fire Emblem: Seisen no Keifu