The HN community's response to the Raspberry Pi is the most sustained example of tech industry gift-horse-examination I can think of.
Here they are with a wide range of SBCs and microcontrollers at a wide range of price points, with a level of industrial support, OS support, community support and documentation that none of their competitors match, committing to (and displaying the fruits of that commitment to) support each piece of hardware for over a decade, and HN is like:
"Who cares I got this N100 on Aliexpress from a company with a procedurally generated brand name who don't respond to support requests, will never issue a firmware or driver update, and will be impossible to find before my next birthday, if I can figure out who actually manufactures this at all"
Dudes. It's not the same picture.
And sure, secondhand PCs. Good. But that is a completely different, entirely subjective comparison.