An engineer will rarely tell you that something is impossible. Ask an engineer to build a bridge across the pacific ocean. The response you get will not be "thi

An engineer will rarely tell you that something is impossible. Ask an engineer to build a bridge across the pacific ocean. The response you get will not be "this can't be done", but "the costs involved make it impractical". It's similar to this phone idea. Of course a modular phone can be built, but the trade offs involved make it impracticle.