The example domains linked to in the announcement are all down for me:
https://get.dev/ https://github.dev/ https://grow.dev/ https://accessibility.dev/ https://slack.dev/
etc.
https://get.dev/ https://github.dev/ https://grow.dev/ https://accessibility.dev/ https://slack.dev/
etc.
I remember people complaining about the .dev tld for this reason. Many people have it routed locally.