note the axes_grid1 is mildly deprecated,

@jklymak do we have written this out somewhere and described what that means? While I fundamentally support moving away from axes_grid1, we should announce our plans. I think a good place would be https://matplotlib.org/stable/api/toolkits/axes_grid1.html

Originally posted by @timhoffm in #29809

As pointed out above by @timhoffm, despite my claims, axes_grid is not actually deprecated. We could discuss whether we want to, or if we want to bring axes_grid into the main library.

I think a lot of axes grid is done my layout='compressed', but some things are different, and one could imagine wanting an object that is just a grid of axes. So bringing the functionality into the main library might be desirable.