Hi Willem, no it was never my intention to add this sort of functionality. The re-size function had in fact already been implemented, hidden/dormant (or at least not used) inside WordPress. I don’t know since when it has been there, I just stumbled upon it at some point and devised a way to ‘wake it up’ and offer the re-sizing as an option in the WordPress upload dialog, adding the option through a simple hook.
I’m pretty sure the WordPress function had originally been created for this kind of use and I still think it has purpose (many websites use far too big images since many people do not bother sizing camera images down before uploading them)… but apparently the WordPress core team thinks otherwise because in the most recent versions of WordPress, the function has been removed. Again, I was not aware of it as it has been silently removed) so I had to ‘unhook’ the option again.
Anyway, the choice to leave such matters up to plugins has merits too. Maybe I’ll do a simple plugin one day that reinstates the old function and offering it as option during upload, without it being as ‘complicated’ as Imsanity. ??