Impossible. Heck, even the occasional use of modern Russian or modern Greek as a liturgical language has been swiftly dealt with by the hierarchy of the respective local churches. (though, OTOH, modern Serbian can now be used as an alternative to Church Slavonic in Serbian jurisdictions).
Not only canonically impossible, but it simply wouldn't work. The music, be it Byzantine monody or Slavic polyphony, is composed with only the voice in mind. Adding musical instruments would be unnecessary, and it just wouldn't sound right. As for a "folk" liturgy, where the gravitas and majesty is replaced with a feel-good approach .... ewwwwww.