Nowhere does it say "majority of users".

Moreover, Google docs says that even even 0.0001% shouldn't be taken lightly.

As I keep saying, the person who's pushing for XSLT removal didn't even know about XSLT uses until after he posted "intent to remove", and the PR to remove to Chrome. And the usage stats he used have been questioned: https://news.ycombinator.com/item?id=45958966