Yes though I suspect Photoshop's load time could be significantly reduced by limiting the features available at load time. If the method code for the 223rd most popular effect is loaded into memory prior to the user being able to do anything, Adobe is doing it wrong.
Maybe so, but that kind of dependent loading might also significantly complicate the code. I have no idea how Photoshop actually handles this but it's about as close as software gets to magic already so I'm disinclined to accuse the developers of incompetence or sloth.
