Comment Or ... N100 or old Intel NUCs (Score 1) 30
Raspberry Pi's are the right fit in specific cases.
For example, you need to interface the GPIO pins to some devices.
But there are issues with it in other cases.
For example, the cost rises as you include accessories, such as a case, fan, various hats, and so on.
If you just need a low(er) power x86 platform to run a stock Linux distro, then plain mini PCs or older models of Intel/ASUS NUCs will fit the bill nicely.
You can get a 2018 NUC for ~ $100 or so.
They already come with M.2 slots, and some have SATA connectors.
They have SODIMM slots so you can upgrade RAM later if you want.
Running Xubuntu or Ubuntu Server is a breeze.