at the end of wod it was idd hard to get into a group for mythic dungeons if u werent high ilvl
but this wont be the case in legion since there are higher ilvl dungeons for those ppl and no reasons for them to do the mythic istead of mythic+
also, there are few ppl left now in wod who arent raiders who run mythic for upgrades to progress the last bosses of hfc