Murray Sargent writes in part:
It's good to have this discussion. Clearly Presentation MathML is used a lot for interchanging math zones between programs. Also I haven't given up on the idea of the browsers rendering MathML well natively. If IE ever succeeds, it'll likely look like TeX, since both IE and Edge use LineServices. And it should be way faster than Java script code.
This would be good to see.
-- Bill