What qualifies as prominent to you? How old are you? On Tiobe Index only Pascal and Go are in the first 50, while half of them aren't even listed in the first 100. Sure they're important and had an impact on new languages, but most of them were made ~50 years ago.
So many new languages were developed since then, which are far more useful and prominent than these legacy ones. If almost none of the modern ones have implemented it so far, is it really that useful/needed?