Yes, it was me that backported some of that telemetry to both Windows 8.1 and Windows 7, circa 2015 when I was working on the WU team but we used WER to upload

Yes, it was me that backported some of that telemetry to both Windows 8.1 and Windows 7, circa 2015 when I was working on the WU team but we used WER to upload that to our endpoints. I don't think there was any telemetry at all before 2015 in the base operating system.