Geez for the prices listed in the article (153 EUR and 301 EUR), get a TMM (tiny mini micro - https://www.servethehome.com/introducing-project-tinyminimic... ) computer. These are the SFF/USFF off-lease older enterprise computers like Dell Optiplex. Note that ServeTheHome.com does power consumption for every model it reviews. These ~1L sized computers idle in the 7-13W range. Even with EU electricity prices, it would…
A complete computer is at least somewhat hardened against ESD and what not, has onboard storage of some description, and isn't severely throttled from a power standpoint.
I like RPis and similar for rapid prototyping if I know I need GPIO control, but if you don't, there are better machines out there, at similar price points.