[mananaysiempre]

The syntax felt off to Juniper, too, so they made their own: https://juniper.github.io/libslax/slax-manual.html. Loses homoiconicity to some extent, sure, but outputting XSLT using XSLT never was particularly pleasant.

[Exoristos]

I can confirm that SLAX is a pleasure to use. Pity it hasn't had adoption outside Juniper to my knowledge.