The other way EFS will bite you is if you don't have enough provisioning and you push changes to prod that make it throttle to a point where it doesn't work and

The other way EFS will bite you is if you don't have enough provisioning and you push changes to prod that make it throttle to a point where it doesn't work and then you're making emergency changes from a hotel room on vacation. I don't think that's AWS explicit business model, but I think they're perfectly fine with it happening.