Probably because it was free.
IIRC it was 'free' to subscription owners, not the general public. Same for Atrix. which was a great diagramming tool. So I paid for access to it. multiple thousands of dollars US to autodesk over the years is neither free nor libre.
I really think that what happens at Adesk is the corporate 'champion' of a product or some other initiative, get's sidetracked, demoted, moves-on or leaves, and the thing they were moving forward just withers on the vine, either getting minimal upgrading to work with new versions, or is abandonware until it dies when OS or other prerequisite software is unavailable.
Hence Vlide, Design Review, Markup Manager, Sheetset Manager, DWF, iDrop etc. stagnating or vanishing. Even going back to R-13 and MLine command. my 0.01 euros