Lasting linguistic change is rooted in the developing speech patterns of children. My Greek teacher once told us that while “caca” is considered a mere childish vulgarity, the Indo-European root for shit is [you guessed it] “ka-ka”. So when I thanked a little girl for holding the door for me at the library and she replied with an elided “y’elcome” I decided I might as well start using that myself. I’ve already grown up with my own developed elision [H’lo instead of Hello] so it ain’t like it’s never been done before.