When did the word 'want' stop meaning "in need of" or 'lacking' and begin to refer to desire? (Evidence old phrases with the original meaning like: "want for nothing" or "waste not, want not".)
have a desire to possess or do (something); wish for. "I want an apple" synonyms: desire, wish for, hope for, aspire to, fancy, care for, like; More
(archaic) lack or be short of something desirable or essential. "you shall want for nothing while you are with me" noun
(archaic) a lack or deficiency of something. "Victorian houses which are in want of repair" synonyms: lack, absence, nonexistence, unavailability; More
a desire for something. "the expression of our wants and desires" synonyms: wish, desire, demand, longing, yearning, fancy, craving, hankering;
- very old or old-fashioned.
Old doesn't mean dead. Thus, I find the assumption that this meaning has ceased, wanting.
There is a film short written and directed by Keir Black called I Want for Nothing made in 2008 (but not released yet).
Listen to the song "I Want for Nothing," a 2009 effort of the band Wye Oak.
From the 2000 book Texas Anthem by Kerry Newcomb:
I'll be a good husband to you, Rose. And we'll have a wonderful life. You'll be my queen, I promise, and you'll want for nothing.
The historical change may be acoming, but it's not here yet.