It is useful for anyone who has a personal domain from which they'd like to send/receive without needing to migrate off Google entirely. My registrar gives a few email addresses with SMTP support. Then I use GMail's send-as to remain in gmail but still use my name@mydomain.com mailbox.
I tested over the weekend and Astra can
- create and modify schematics from instructions - place components and route traces
out of the box, just via normal 'computer use'. I'm not satisfied with the routing but it isn't terrible.