Like any dynamic language, English words come and go, some change meaning
Good words gone bad:
mistress
fag
cock
Words gone by: as in seldom used
britches
floppy disc
agone
verily
Recent words (around 20 years or less)
asap
ain't
fax
It won't be long before "noone" becomes standardized as it becomes used often, with or without a hyp-hen