Ability to add domains without a redeployment (and/or multiple domains at once)

[Berdir]

I assume this requires support on the API first or possibly even the underlying systems, but I thought I'd bring it up.

Adding a domain is in most cases not sufficient, you also need to deploy a routing change. About the only exception is the first default domain that you add. But we often add multiple domains at once (redirects, multilingual) and add one or multiple new domains to existing live projects. Every time you do that, it forces a redeploy. -W still does that, just in the background.

I think a --no-redeploy or similar flag would be super helpful and would reduce unnecessary downtimes/slow requests caused by extra redeploys.

[pjcdawkins]

Absolutely right. We have been planning a solution at the API level, and I've passed on your message supporting it.