> Maybe a more sensible 250x250 size would be a good default, as I seem to be able to fill a 1080p screen with just under 250 columns, and it would give some scrolling overhead?
>
> that's at least a 16x reduction already compared to 1000x1000.
>
> You could dynamically calculate the number based on the terminal properties, but that would likely break on terminal resizes.

it;s a bit more subtle

this is the canvas on which the text gets put,
your terminal is just a viewport into that canvas.

the number of cpus etc determines how big that canvas needs to be, not the width of our terminal