Given that a simple CDN is the normal way to solve the problem the linked page is talking about, it's hard to understand why they didn't include a price comparison against placing a simple CDN in front of a Storage hosted static website to help the reader understand how Frontdoor does or doesn't improve on the costs and/or functionality of that approach. At a bit under $1/day the Front Door approach feels more expensive than the CDN solution but I'm not an Azure expert so it would be great to know for sure.

Also, I tried to give feedback on the linked page using the integrated give us feedback popup that was presented to me on my iPhone. The result was an error code which isn't confidence inducing.