Surely the implication is that what's inside is garbage. :P
(which, these days is mostly true, a single socket CPU on a workstation of that grade is a poor design choice)
(which, these days is mostly true, a single socket CPU on a workstation of that grade is a poor design choice)
Not at all. Even people that love them refer to them as trashcans. It's just a cute nickname, since Apple doesn't give their machines any other distinguishable names.