I did a search on Mobileread for any threads that mentioned DeDRM before my post. The one you mentioned had the most posts by a hair but not even close to "10s of thousands". Heck, if I combined the 3 busiest threads (
DRM workaround: Kindle for Android,
Dealing with Kindle for PC/Mac 1.19 and KFX in calibre,
Amazon and DRM changes, they didn't reach 5,000 messages total.