Feature creep seems to be a common failure of many standards. Bluetooth or usb-c to name some others.
World is missing a standard, a good and lean one is created, multiple vendors implement it, there's an initial year of minor incompatibilities but otherwise all is gold and glory, everybody loves the standard. Standard becomes immensely popular so everything supports the standard and worse - the standard starts supporting everything because every vendor just has this one small extension they want to add. After adding thousands of such extensions, suddenly the standard isn't so lean anymore. Now the spec isn't just a single RFC that can be read over lunch. It's a whole collection of documents with thousands of pages, appendices, mandatory extensions and compatibility tests. You need few people employed just to keep up with organizing the documentation. Vendor implementations start becoming incompatible because of too high complexity. Only a few big players manage to stay afloat and they probably like it that way because it raises the barrier to entry and they get to keep their position.
World is missing a standard, a good and lean one is created, multiple vendors implement it, there's an initial year of minor incompatibilities but otherwise all is gold and glory, everybody loves the standard. Standard becomes immensely popular so everything supports the standard and worse - the standard starts supporting everything because every vendor just has this one small extension they want to add. After adding thousands of such extensions, suddenly the standard isn't so lean anymore. Now the spec isn't just a single RFC that can be read over lunch. It's a whole collection of documents with thousands of pages, appendices, mandatory extensions and compatibility tests. You need few people employed just to keep up with organizing the documentation. Vendor implementations start becoming incompatible because of too high complexity. Only a few big players manage to stay afloat and they probably like it that way because it raises the barrier to entry and they get to keep their position.