There are ROMs that can do this, but probably none that work on this phone at this time.
That is where everything is heading, though. Eventually we will all carry a single phone that fills the bulk of all processing and storage needs we have. It will mount into tablets, VR headsets, and PCs to create different user experiences, but the processing and storage will largely remain on the one device. Personally, I think that is fantastic. Being able to write code or play games with a mouse and keyboard, create/edit images on a tablet, and still carry all that data with me everywhere on my phone is fantastic. You'll never need to carry large devices with you when you go places. Just find a nearby tablet/PC dock and load your own system right away.
Microsoft's Continuum feature is sort of a first step towards this. Google adding the Play Store to ChromeOS and multi-window support to Android also seems like a step in this direction.
