All of these work from here in Grenoble, France...
With a standard TCP/UDP session, it mostly just works or doesn't and you can get a proper traceroute to know what's up. With these fancy CDNs, there's a whole new can of worms to deal with and from a client's perspective you have no clue what's happening because it's all taking place in their private network space where we have no "looking glass".
Fuck the cloud, i want real Internet.
edit: My whole Twitter timeline is full of posts saying "Twitter outage? what outage?". Same on Reddit and Twitch chat, feels like for a short time I was invited into some exclusive circle lmao. StackOverflow and other StackExchange sites also work so I can look stuff up for you.