> Honestly pretty shocked that something at their scale could be depending on Fastly for core assets.
Why would that be surprising? Fastly has many customers of similar scale. Amazon.com has fastly as one of the options to serve as their CDN (as was publicized when a fastly outage took down amazon briefly last year).
Probably reductive but in my head Cloudlfare and Cloudfront are the only 2 "mega large" CDNs and, to your point, I've only ever heard about Fastly in the context of outages.
Why would that be surprising? Fastly has many customers of similar scale. Amazon.com has fastly as one of the options to serve as their CDN (as was publicized when a fastly outage took down amazon briefly last year).