Costco list the model and the manufacturer provides all the information about the chips on their website. If you're running a distro with a 2 year old kernel then you may have issues, but I run Arch so it works flawless. I just got a Ryzen 4600 on Costco for $429 and everything works great.
Not everyone runs Arch or a distro with anywhere near the newest kernel. Not everyone feels like digging for posts online that show what wifi/ethernet/etc chipset a laptop is using so they know beforehand whether or not its going to be a pain in a more LTS minded distro.
