For whatever reason (it's probably a mix of NAT, the extra routing needed for CGNAT, and other things) there is a measurable difference in time to first byte on v6. Apple measured it as 40%: https://www.zdnet.com/article/apple-tells-app-devs-to-use-ip...
(Also, doing things like loading a webpage requires many round trips, so even a small RTT difference multiplies to a bigger delay for total load time.)
You don't need to remove v4 to get benefits from v6. For example, you can handle inbound v4 on your load balancers to avoid needing to mess around with it on your entire VM fleet.
(Also, doing things like loading a webpage requires many round trips, so even a small RTT difference multiplies to a bigger delay for total load time.)
You don't need to remove v4 to get benefits from v6. For example, you can handle inbound v4 on your load balancers to avoid needing to mess around with it on your entire VM fleet.