I have a big Miro board with probably around 800 images on it. I can not complain about the general loading speed considering the amount of content.
However when I quickly want to check the latest sketches which were uploaded (as jpgs) then I have to wait until the complete board is loaded because it seems to load pictures chronologically according to the upload date. This can take 10-15 minutes until that last picture is visible which I actually want to look at.
It would be really great if Miro could recognize where the user is zoomed in and load the pictures around that area first.