I’ve read through the GitHub repo and your message here and was surprised to see this is an 802.15.4 IPv6 mesh yet I see no mention or comparison to Thread - for which this project appears to be heavily influenced by or copy of.

I also have significant knowledge and experience of the current IoT space (specifically focused on the consumer market) and while standardizing these lower layers of the OSI stack is important it will not solve your interoperability concerns. Secure IP based IoT device connectivity is largely a solved problem - the currently _unsolved_ problem blocking interoperability is mass standardization and adoption of an interaction, device, and data model. Zigbee, Z-Wave, HomeKit, Weave, etc. all provide different and unique ways to describe the ontology and capabilities of a “thing” and it is at that layer that mass adoption is needed. Imagine if every PC manufacturer used a different variant of HTTP, REST, and JSON - that is the state of the consumer IoT market today.

The new hot thing in this space is Matter, which does appear to have commitment from the major consumer players for mass adoption. Obviously it is too early to say if this will drive the mass standardization and interoperability you mention, but personally speaking I am very optimistic and excited :)