Why is liturgical form "irreversible"?

As G.K. Chesterton put it, it's useless to say you can't put back the clock, that's literally the function of the clock, to be able to put it back.. that is. So who is Pope Francis to say that liturgical reform (which millions of well meaning, highly educated Catholics are rightly skeptical of) are unable to reverse liturgical reforms? > https://www.catholicnewsagency.com/news/36674/for-pope-francis-the-liturgical-reform-is-irreversible When all the present Novus Ordo backers die off, leaving a vague Protestant Catholic Church and the recognizable Catholic Church favoring Liturgical Tradition over Liturgical Innovation, won't the _Vox Populii_ take over and the liturgy will automatically "unreform" itself?