>> Standard licenses have well-known relicensing effects and you have a
>> pool of other projects with compatible licensing to cross-pollinate
>> with without involving lawyers.
> Agreed (though is that point so applicable to font projects?).
It is very applicable — most free and open font authors will focus on their own native script, so producing fonts that work in a globalized context requires sharing between works what started as separate projects.
Ghostscript fonts, Vera, etc have been reused multiple times (and show up as licensing problems in new fonts regularly since their licensing is not as clean as new from-scratch projects)