I think I was expressing surprise that there isn't a mature infrastructure for this. (Thank you for introducing me to Gatsby) You could turn it off if and when

I think I was expressing surprise that there isn't a mature infrastructure for this. (Thank you for introducing me to Gatsby) You could turn it off if and when you face any bandwidth limitations - if it was a mature system, then you could turn it off globally in the browser. Intermittency can be overcome with the right technical approach. It's potentially great for intermittent connections, since it can pre-download materials whenever your connection is good. I guess it won't be supported between different sites, because it introduces risky conflict between tracking and privacy, that hasn't been legally resolved. (Any external link creates a privacy/tracking/security/authentication hole, whether the user clicks it or not). Maybe that's what has ultimately prevented wider adoption.