I just love this: 
What the wider Web community needs is a language which, if implemented by a Web browser, will result in a browser that can render all the existing content on the Web, and which will have new features to make the Web a better place. XHTML2.0 is not such a language - a browser that only supports XHTML2 could not render existing Web content correctly.

Yes, and a browser that supports only XHTML 1.1 will not render existing content. A video recorder that plays only VHS tapes will not play Beta tapes. 
Is the removal of support for HTML in User Agents a requirement for adoption of XHTML 2? Are the XHTML WG demanding that XHTML 2 becomes a drop-in replacement for HTML 4 and XHTML 1? Of course not. 
