You can't switch parts in a laptop/nettop. For this reason there will always be a reason to own a tower for savvy users who own multiple computers. One is to be

You can't switch parts in a laptop/nettop. For this reason there will always be a reason to own a tower for savvy users who own multiple computers. One is to be left home while the other is taken on trips. There are enough reliable sync solution, so it isn't an issue.