Among other things, it features automatic TLS via ACME and dead-simple configuration for my most common use cases: namely, serving a directory of static files and reverse-proxying to an app server.

It is written in Go, but I certainly wouldn't describe it as "cobbled together."

I'm also a fan of Traefik but it's strictly a reverse proxy, there's not even built-in support for serving static files. But it's great if you have e.g. a bunch of containers on a single host and you want to front them all with a single load balancer.