> Makes upgrades easy: plug it in, rather than having to tear the box apart. In theory yes, in practice it comes with a hefty price tag. External thunderbolt d

> Makes upgrades easy: plug it in, rather than having to tear the box apart. In theory yes, in practice it comes with a hefty price tag. External thunderbolt disk arrays are quite expensive and something that would be unnecessary if the mac pro had some form of support for internal drives.