Could that be how Anduin ages 40+ years?
Also would be cool to see a 50 year azeroth time skip. What would be different? Could also explain the possible Azeroth revamp. Lots of lore characters we know and love would be gone though. Could be a way for them to reboot the franchise a little. Sub races etc. Could also allow for cross faction races if thats your thing. Or another faction altogether. So much potential.