It's more of a chance than the norm, then.

My Dad's Lenovo Ideapad comes with a soft-raid of two SSDs for example, since a faster and twice bigger would be much more pricey.

Also, I've seen non-standard GPUs, tons of broken BIOS tables, vendor specific devices with weird quirks and whatnot over the years.

Maybe these things still happen but newer kernels know how to deal with this better, I don't know.