Ai can display triangular meshes alright, but not edit.

We can generate one by expanding modern 3D object with the Render as Vector option turned on, we can have one generated after expanding an object filled with Freeform Gradient (which is just the live container with control points for creating one, with no control over the density).

But once they are created, we get 'Non-Native Art' bricks we can do nothing with — no Recolor, no direct edit with mesh tools, only scale and rotate and distort.

Not enough! We need you to support these fully.
And make some good tools for editing meshes. Sure, we have meshtormentor.com — but how many users are aware of it?