Can I rely on CZML? The state of its documentation is worrying, to say the least

It was last updated in 2016, the vast majority of information is hidden behind an easy-to-miss “show 128 more pages…” button, and it’s worryingly hosted on a Github repo owned by AGI, a subsidiary of Ansys that peddles the closed-source STK. What happens if they decide they’d rather not have competition and wipe the CZML documentation from the face of the Earth? Why isn’t it on the same page as the rest of the Cesium documentation?