Not about certs, but I found the opposite moving from Caddy to Traefik: in amending the caddyfile, I had to restart the Caddy service which would kill any open connections that were being used. In Traefik, it’s dynamic, so can update the services without having to restart Traefik itself.

My main move to Traefik was due to file transfers for reverse proxy services like File Browser slowing down after a period of time, whereas in Traefik, they stayed at a constant speed.

I now run Traefik as part of Pangolin, so most config is set by that.