Despite years of ownership and reading, I’m truly not sure when or if they have all been rotated out of every unit’s stocks.
In September of 94, I was in the 747th MP Co (MA army national guard) and we ferried HMMWVs that were already heavily used by some other unit at Devens, to our new armory in Southbridge. Nothing but HMMWVs in that unit.
At AT97, with A/1/181 Infantry out of Worcester, I remember we had CUCVs, not a HMMWV to be seen except FIST and mortar type guys . I distinctly remember being in the bed of a M1008 as we bounced through some interesting terrain.