[withinboredom]

You can get around most of the consistency problem by "scheduling" the change. So, if I know it is going to take 2 minutes to make the flag available to my entire infra, I can schedule it for 5 minutes from now (could even make this configurable—a "default feature delay") which moves the consistency problem to infrastructure clock-sync.

[GeorgeMac]

Thats a great idea! I hadn't thought of combining it with a schedule for when a change is readable.