If you need or want #steamos today, i don't reccomend getting the recovery image and hoping it works, rather just use #bazzite , it's a community maintained operating system that is very batteries included for whatever you want or need today. SteamOS itself I don't know why you would need it specifically,
if it's for #arch then install arch or #endeavouros ,
if you need an immutable and stable system, #universalblue and #VanillaOS have you covered.
If you need a preconfigured OS that has everything you need out of the box, bazzite is a great option.
If you only trust valve, and valve is the only thing you would trust if you are ever gonna use linux, valve sponsers #archlinux , helping with infrastructure as chosen by the project itself.
#Linux is a vast ecosystem that span across different projects for different reasons and methods, and #valve is a great force that helped pushed it to where it is now in terms of how mainstream it is. Linux is already here as a desktop and even to be used as a console OS. If its not working or perfect for you, thats fine, just know that to figure it out, just try it out, even in a usb boot, its not perfect, but it does suite some people better than others.