You decide:
here's the 10,000 largest images. Check a few of them, and see if they're worth saving.
Judging by the file size, I already see a few duplicates.If you allow images >2.5MB, you shouldn't provide [img]-tags for them, and add a warning that it can only be linked.
Yeah... I think it's better to guarantee the limit, for a better forum experience.
Larger images are linked by the forum as external links/files, so each one manages this as they see fit.
Perhaps if in the future I manage to add some warning element in this regard, I will try to do so.