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Revised Raspberry Pi 5 chip comes with unexpected power savings
(arstechnica.com)
This is a most excellent place for technology news and articles.
Industrial is not all high tech or efficiency driven.
It's about cost and availability. They probably buy in bulk, have some Linux image with the exact setup they need. Then they just replace them if they break with little to no downtime.
For smaller bulk-use applications there's microchips like ESP or Teensy. For larger applications there's X86.
For a cost effective pi alternative there's Rockchip stuff.