Well it isn't that simple :)

It mentions 144FPS, because of scrolling/zooming events.

If there's a key-by-key panning then probably you need 1 frame and you're good. Macbook's Pro touchpads generate events with 150hz - and in order to maintain "butter smooth" FPS has to follow.

Number of cells on screen matters: rendering 80x80 is not a problem. After zooming out and 1000x1000 on screen panning with 150FPS is straightfoward.

In the end there is a deterioration of user experience when jank in scrolling, zooming and even typing happens.

Thus ceiling right now is around 144FPS, mostly because ~6ms budget (on M2 Macbook and 4K 144hz display). 60hz refresh rate 60FPS is an easy mode ;-)