Thanks a lot for your helpful comments Wolfgang.

I will add to my todo list "Write a few lines about font installation
> for XeTeX and LuaTeX and how to use them in style keys".


With the bits and pieces of information ( current and outdated ) about these
matters presently being scattered all over the place, an updated guide will
definitely be very useful for newbies ( and oldies ? ), speeding up their
comprehension and enabling them to focus on what's important, i.e.
productive issues, using ConText with LuaTeX/XeTeX.

Have a great weekend,
Alan