I'm sure we'll see another engine in the XC70 before it dies... hell, the XC90 went through 4, 5, and 6 speed automatics, turbo 5, 6, V6, and V8 engines too!
I drove the old XC70.. it was a relaxed drive but I did not enjoy its FWD dominance. Do you still find this James?
It has also got open diffs everywhere eh? Volvo still thinks TCS power routing > Limited Slip