Definitely talked too fast! You're right, it definitely works. It's a little bit...

Definitely talked too fast! You're right, it definitely works. It's a little bit shadier on WAN but the main reason for the pre-aggregation is that the fire+forget behavior is much harder to scale as a service and would wastefully cost a lot of WAN bandwidth.

Once you have a pre-aggregation and only periodic updates... UDP does not make sense anymore.

HTTP also good for browser clients which could make sense.