Even before browsers started implementing separate caches, I really hated the idea of using anything off of a Google CDN. You don't pay them. You're not their c

Even before browsers started implementing separate caches, I really hated the idea of using anything off of a Google CDN. You don't pay them. You're not their customer. There is no SLA. Just host it yourself, or us a CDN you pay for. Why depend on an external service with no SLA, just for a little speed boost? If they're down, you're down. Break those dependencies on external sites when they're not necessary.