Indeed this seems to be the main cause for them to recommend either Docker or Ansible.

This is what the notice (https://join-lemmy.org/docs/en/administration/from_scratch.h...) actually says:

> Disclaimer: this installation method is not recommended by the Lemmy developers. If you have any problems, you need to solve them yourself or ask the respective authors. If you notice any Lemmy bugs on an instance installed like this, please mention it in the bug report.

Supposedly so it's easy to reproduce issues locally. I remember participating in the PHP community long time ago, and constantly having to replicate peoples arbitrary Apache/NGINX configurations just in order to reproduce issues, so it's not surprising that people are using Ansible/Docker for setting up development environments.

I just wished people stopped pushing for that bloated mess in production too, but step by step...

Theoretically, you could run a web server and database both written in rust and have your entire dependency stack contained within cargo. Literally deployment with a single `cargo build` and just a couple weeks of build time

Sure, which is what the conduit Matrix server does. But at a certain point people will likely want a resilient database.