There are some uses for it in in-house font design - which to some extent could include lilypond - but MM fonts are not really offered any more, and nobody is developing along those lines.
It's more or less an obsolete technology, and could not be recommended for lilypond.
Andrew
Looks like we might need something like <URL:https://en.wikipedia.org/wiki/Multiple_master_fonts> or whatever is supposed to be used in its lieu instead."Multiple master fonts contain two or more "masters" — that is, original font styles — and enable a user to interpolate between these masters along a continuous range of "axes."" That sounds awesome! Yes, it would be great to have this (i didn't even know that there already exist systems that interpolate between two given fonts!). Janek
