From here originally:
I totally get why ZD does it the way it does, but it is less than optimal. Even having the "/hc/en-us/articles" adds unneeded complexity. It would be a very cool feature to have the ability to customize the URLs. Being able to change the slug while editing the article would be awesome. So then we could achieve something like this: "help.mydomian.com/user-guides/product-xyz-help" or (for an article) "help.mydomian.com/article/product-xyz-troubleshooting"