Board Thread:General Discussion/@comment-108.30.110.252-20180904164238/@comment-1038387-20180904181645

Technically, all skins violated GDPR. But as Monobook was no longer supported (and I think used a different tracking system anyway) it was decided to drop it altogether rather than start up support again and rewrite the heavily forked Monobook code. It was simply not cost-effective to do that. Only the more prominent skins were updated.