Alien_Fluff said:
Just found out that there are also new maximum image dimensions, too. Even for FA+ users.
https://twitter.com/ThePlag16564083/status/1596796987579322368

Has anyone got an answer as to why this is based on resolution and not pixel count? Or tested to see which it really is?

@savageorange: Probably so people can't break display by having an absurdly tall or long image. A lot of things allow limitations based on dimensions (such as DA) but not area.