I bought a Switch each for me and my kid for Christmas last year. Mine was second hand and a v1, but my kids was a brand new v1. Mine turned out to be faulty, so I returned it and bought a new one about a month or two later, and got a brand new v1.
Chances are we got the last of the old stock, but if we bought them a few months apart and both got the v1, there are probably still a decent amount out there still under warranty.