Why not Traefik as reverse proxy?

Configuration is much easier, e.g. this is the full config you need to expose nextcloud on nextcloud.example.com (assuming caddy can reach nextcloud using the hostname nextcloud)

nextcloud.example.com {
        reverse_proxy nextcloud
}

Comparing that to ngnix configs that need a template for each different service (although to be fair they're mostly the same).

Caddy config ("Caddyfile") is super easy to configure. In some cases it can be just one line to reverse proxy something. Search for a caddyfile example and you'll see.

I was also used to npm. But caddy(file) is much cleaner and nicer and less hassle. It can be more difficult to set up because you may have to learn some things as it has no ui

My config is so barebones it doesn't need a UI.

But when I started out, a UI would've been amazing