It's a delight to use, if a little esoteric at first. After the experiment phase, the software ecosystem comes up fairly limited. But I recommend visiting.
I briefly emulated it with UTM (QEMU) on macOS; the host was an M1 series chip. This story is the first indication that I might run Haiku on that machine's bare metal someday.
I was trying to set up an install for my HS age some to learn programming this summer with minimal distractions. I was surprised to see IntelliJ runs and they’ve integrated GNU core utils. A hello world program ran fine.
It’s effectively a different kernel and window system for GNU at this point. Tons of GNU ports. Most targets cannot run original Be software for the obvious reason.
The platform itself. Like, can it run Firefox? Can I actually do normal stuff in the browser like watch a YouTube video or join a Zoom call? Can I run VSCode? Can I run Docker?
It is not a Linux distro. It is not a Linux at all; it is a completely different, independent OS. It is not a Unix at all: it's an independent ground-up C++ OS that implements a lot of POSIX-type APIs to make it easier to port Unix apps.
Docker is literally a Linux native tool that is for Linux only. The only way Docker works on anything that isn't Linux is by running a Linux VM, containing Alpine.
It is not a Linux and no you cannot do Linux things with it like run Linux containers, because to run Linux containers you need Linux and this is not a Linux.
I am trying to emphasize this because your question seems to be asking "what kind of Linux is this?" and this is a category error.
> The only way Docker works on anything that isn't Linux is by running a Linux VM, containing Alpine.
Sorry but this is demonstrably false. Not only is Alpine not a requirement in the slightest, Windows Server's own containers work as a backend for Docker just fine.