The individual details of the systems don't really matter. Sure, they each have some small advantage or disadvantage, and you can argue about them for a long time, but in the end, what matters is usage/adoption.
A widespread but suboptimal system is better than a system with better properties that few people know/use, because the differences barely matter.
Unfortunately, there isn't sufficient need for such a system that ordinary people would regularly come into contact with it, and any group of people that does have such a need already found a (proprietary) solution, so it's unlikely we'll get a standard soon unless big players agree on one and aggressively push for it.