I wondered that too. It would make sense I think.
As for the £449 price, it's something I'd be willing to pay if I knew it was going to be the answer to what I needed but as with all gear you never know until you've thoroughly tried it, which usually means owning it for a while.
It's just a bit too high as I ended up flipping the other BassRigs. As of yet I've never preferred a 'cab-simmed' sound no matter who makes it.
I did particularly like one of the Origin Fifteen demos but it was impossible to determine whether the mojo was a good P bass or not as the pedal was always on.
But I do keep coming back to that demo.