Music WI: Pantera take a year's hiatus?

Let's say Phil Anselmo, when he learned of his back problems, took a year out for surgery instead of going to drink and drugs, and Pantera went on Hiatus at that time. How would that affect music?
 
I think Trendkill could be butterflied, since vocal and instrumental recordings had to be held separately, and Pantera may still be around, butterflying Dime's death.
 
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