I can see how this could improve the resolving latency slightly, at the expense of more network traffic. Like you said, it must be tricky to get that integrated

I can see how this could improve the resolving latency slightly, at the expense of more network traffic. Like you said, it must be tricky to get that integrated properly. It seems like a weird optimization to do and unrelated to VPN. Maybe they have fast-changing DNS entries when nodes are joining and leaving.