[XeTeX] The future of XeTeX

[Philip TAYLOR]

Martin Schröder wrote:

> You are right.
>
> Do a 'texdoc xetex' and 'texdoc luatex' and compare. :-)
>
> E.g. polyglossia does not work with LuaTeX (yet).

OK, fears concerned.  But of course polyglossia is a macro
package; do you happen to know what is different at the
TeX/XeTeX/LuaTeX primitive level, which from my perspective
is a far more important consideration ?

** Phil.