you mean an image like this?
This is what I've been running on my generic x86-64 system for a couple of years now, 0 issues. Even migrated to a newer system recently because I wanted something that was slightly faster for ESPHome compilations.
I mean... That is how a lot of OSes are distributed: by giving you an ISO that you burn onto a USB dongle to install.
> In my case I used an Ubuntu livecd to download and write the image to the machine.
So... Same thing?
The HAOS ISO cannot install itself onto a machine. That is my minor complaint.
While it is technically no longer supported, you can still install the whole kit and caboodle using pip in a Python virtual environment, but why would you?
This is how I did it, instead of the container or HA OS in a VM.
If you want the simplicity of everything preconfigured, managed, and hands-off, go with HA OS, whether in a VM on a beefier machine, standalone, or the HA Green/Yellow dedicated hardware.
But if you already have a home server and want to add HA, I found just pip installing to be easier than dealing with the container.
Maybe I'm just the silly type that enjoys fiddling with Linux, but I'd argue that it actually makes more sense to install HA bare metal over a container. HA doesn't actually have any major dependencies outside of what pip installs, so setup wasn't any more annoying than via container. And then you never have to deal with container annoyances like passing hardware through to it or weird failures and misconfigurations.
Contrast this with https://frigate.video/, which has so many fragile native dependencies and a super complex stack that trying to install manually is an exercise in futility. I gave up and used the container.
There's nothing wrong with running it on bare metal but this is easier with the VM image.