Hot code reload is imo an enabling practice, and should be done everywhere possible. Restart to reload may be useful or practically required for some deployments, and it's sort of a test of cold start, but it's so disruptive and time consuming. I've done deploys both ways, and time to remove host from load balancer, wait for server to drain, then add back is time I won't get back. You can do a lot more deploys in a day when the deploy takes seconds; which means you can deploy smaller changes, and confirm as you go.
If it's disruptive and time consuming it means you don't use the right process / tools. If you're CI/CD pipeline is properly setup ( and it's actually easy to do ) you don't have to do anything.
