I didn't say there are zero ports open, they're not my home server, I just said they're production servers. But exposing something like a properly configured nginx to the internet is way different from exposing application code directly. Most of my servers have used h2o (built from source because they don't cut releases anymore?) because I wanted HTTP2 and HTTP3 before anyone else would get their act together. These days I still use h2o because I like the config better than nginx, even though it's a pain to set up because nobody packages it (and they don't cut releases!)