On 02/01/2011 18:49, Khaled Hosny wrote:
> Again, my main question is: if they can keep doing what they do right
> now with pdftex (since luatex should be supporting all of it), why not
> give the extra functionality to the people who want/need it; programming
> to the least common denominator is just tying the users of new engines
> by the limitation of old ones.
>
> I'm not suggesting that any one do any thing, I'm just trying to
> understand.

As I said before, changes are likely to be driven by code requirements. 
If there is a point where there is something that we want to do (i.e. a 
core LaTeX3 function rather than something which is optional) that 
cannot be done with pdfTeX, then there will be some 'vigorous 
discussion' and hopefully a sensible outcome.

Give me a few months to get other jobs done, then start on fonts, and 
we'll see what happens :-)

> AFAIK the startup delay was a misconfiguration of luatex formats in
> texlive2009 (and may be before) and it got fixed in texlive2010.

I'll have to do some testing (I do have TL 2010).
-- 
Joseph Wright