As other pointed, changing internals is a PC thing, but at this point XBox seems to be quite close in general software concept to this. Meaning since XBox One, the console OS is the same and allows to run the same games transparently and it looks like Ms will continue this, so it's possible future XBoxes could be seen as a simple hardware upgrade (though you still get a whole new box), instead of a new platform like all generations in the past.