Do you understand this phrase? the weakest link for a RPi node is the fucking USB connection to the drive
RPi's may not be as reliable as other advanced machines, and they may not be the ideal choice for Lightning Nodes. However, I specifically inquired about their suitability for Bitcoin Nodes (not Lightning). Personally, I am using an RPi with a case that supports M.2 SATA SSD, eliminating the need for a USB cable. I can't see the reason to not recommend a cheap lower-power RPi for a non Lightning node, that's why i asked.
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