Usually a OEM does a proof of concept cobbled together linux based firmware to demo the capability of it's new SOC to prospective buyers. WD then takes the OEM

Usually a OEM does a proof of concept cobbled together linux based firmware to demo the capability of it's new SOC to prospective buyers. WD then takes the OEM POC firmware - slaps on their logos and ships it. That is why I would trust NAS manufacturers like Synology or Thecus or QNAP more -personally I use Unraid.