How does this relate to https://en.wikipedia.org/wiki/IEEE_754 https://en.wikipedia.org/wiki/IEEE_754 (2008 edition) which added decimal floating point in a cou

How does this relate to https://en.wikipedia.org/wiki/IEEE_754 https://en.wikipedia.org/wiki/IEEE_754 (2008 edition) which added decimal floating point in a couple of sizes including 64 bit? It's strange to publish something in the same space without any reference to that. It appears to be incompatible (IEEE 754 decimal64 has 53 bits of significand and 11 bits of exponent; this thing has 56 bits and 8). How is that helpful?! Libraries and hardware supporting IEEE 754 exist. What am I missing? Edit: it does say "A later revision of IEEE 754 attempted to remedy this, but the formats it recommended were so inefficient that it has not found much acceptance." at the end. Hmm.