You know as much as we wish for the 2d Disney animation to come back, and we often miss the Disney renaissance, I’m pretty sure back in 2000, it might have been different.
I’m pretty sure by the late 90s and early 2000s people might have had Disney fatigue just like we have MCU fatigue now. While Mulan and Tarzan are memorable in their own ways, I’m sure they are no where near as iconic as Lion King or Beauty and the Beast.
It was no longer the newfound revival of animation, it was just the mainstream at that point. Honestly it’s a kind of a miracle that Lilo and Stitch sold so well being released so late in 2002.
And Pixar probably helped in that death giving something new in the form of 3d and a break from the more over the top stories for something more cozy and relatable.
Of course maybe it will be different now. 3d is starting to become the new old thing and maybe 2d will someday see a rerenaissance. If someone ambitious in Disney is in there, I bet they could make it so. Maybe in 2030.