Not 100% relevant, but there are quite a few people who like to keep inactive windows semi-transparent. At any rate, the only reason you need is user choice! U

Not 100% relevant, but there are quite a few people who like to keep inactive windows semi-transparent. At any rate, the only reason you need is user choice! User choice is always a valid reason. Removing customization options is rarely the proper thing to do. Of course, in this case, users still have a choice: they can choose to install another terminal! Which it seems many of them have done.