Implementation isn't the only cost of features. You need to test them so they don't break. Features can be a burden for the codebase and removal can lead to many edge cases becoming unnecessary. A magnitude of features can overwhelm users, especially occasional users. They steal attention from other features that you may find more important.

And the most important point here: This feature really is broken as of today. Nobody can persuade me that they use it on their main browsers. I don't believe them.