More like people try doing anything other than use the base OS, and realize the bottom-tier x86 mini-PCs are 3-4x faster for the same price, and can encode a basic video stream without bogging down.

If the RPI came with any recent mid-tier Snapdragon SOC, it might be interesting. Or if someone made a Linux distro that supports all devices on one of the Snapdragon X Elite laptops, that would be interesting.

Instead, it's more like the equivalent of a cheap desktop with integrated GPU from 20 years ago, on a single board, with decent linux support, and GPIO. So it's either a linux learning toy, or an integrated component within another product, and not much in between.

They are cheap and seem like the hardware is good enough. The hardware is, but getting software support very diy.

They probably define general purpose as anything homelab based that runs on a commodity OS.