[vgchh]

They don't say much on why not Envoy. It would be interesting to hear if there were concerns with it.

[chillfox]

To me it looked like they didn't have anything technical against Envoy, they just didn't want to be dependent upon someone else for what is a core part of their product anymore. Which is entirely reasonable and a good idea.

[jgrahamc]

That’s right. Long ago we used an open source DNS server for our authoritative service and at some we knew we had to own our our destiny. Same here.