Re: How long before TNG were the Wrath Of Khan uniforms phased out?
Jack Crusher's recorded holomessage to Wesley sees him wearing the TWOK uniform. Presumably this was recorded around the time Wes was born, or about to be born. Picard's crew aboard the Stargazer wear the TNG uniforms. I assume the change must have happened somewhere between Wes's birth and the Stargazer's destruction. How old was Wesley at the start of TNG?
Wesley was born in 2348, so he would have been about sixteen at the start of the series.
"Many things seem clever to an imbecile." --Captain Thelin th'Valrass, USS Enterprise-- "The Chimes at Midnight"