Completely relevant. There's a variant where you don't need CF: compile/install Caddyserver on your box, let it handle the LE certificates by itself, and use i

Completely relevant. There's a variant where you don't need CF: compile/install Caddyserver on your box, let it handle the LE certificates by itself, and use it as a reverse proxy to deliver the request to your current webserver. Caddy being a stand alone binary (it's even possible statically link GLIBC), you can even work yourself around an old distro and dependencies nightmares. Caddy's config file is on par with Nginx in terms of simplicity, the learning phase is quiet small, I would even say nonexistent for someone with a technical background as OP.