I use Traefik at home. The initial setup was more complex than others but now it's set up it's by far the easiest to add new routes than any other I've tried, just by virtue of being right there in the compose/k8s files I'm already writing. Static routes are manual of course, but so are every other proxy so that's no different, and they're not exactly complicated (I see another comment has examples). The config files are the same markup language as your Compose/k8s files so you're not learning a whole new syntax and having to switch languages mentally as you switch between them.

Caddy is super easy, but the fact that the Docker labels thing was a plugin is a con to me, I'd prefer it being first party. It also isn't as performant as Traefik, higher CPU usage while also having higher latency.

As far as I'm aware, Nginx and Nginx Proxy Manager support no such thing, you have to manually write those routes every time you create a new service. Personally I think Nginxs config syntax annoying, I'm very comfortable with it now but I much prefer TOML/YAML.

Nginx Proxy Manager is a lot like Portainer. It's useful for people who don't want to learn Nginx and/or just want to click a few buttons. But anything complex you're suddenly going to be thrown into the deep end.

You've already set up Traefik, you've already done the complex bit. IMO there's no reason to change, from this point everything else is more complicated.

We use Nginx at work but are currently in the process of switching to Traefik.