That's not a desktop setup. It's much more complicated than the workstation setup I use at work. A desktop setup is my Xiaomi laptop with Ubuntu 18.04 that I use as media caster or to browse amazon while on the couch. It works flawlessly, much better than the preinstalled Windows 10 in chinese.
I don't see at all why you're saying it's not a desktop setup. It's obviously a workstation computer with media capabilities. The word desktop implies pretty much that. In contrast to desktop, there are portable computers and servers. Today the difference between portable and desktop amounts to just additional power management tools, so it's pretty much the same. So there's just workstation and server, ignoring Androids, Google Chrome laptops, etc. This is certainly not a server.
As to the content itself, the insights, configs and tools listed are great. My setups have very similar objectives, but solving a lot of these mundane problems can mean days, so I'm definitely saving this for later.