Ahhh geee... I've been vaping now for 2 1/2 full years!
Actually you may still find yourself with a few urges even after a year's time has passed. But they will also be much further removed then you would have thought. And the first six months isn't always the hardest stretch. I once quit cold turkey for 8 solid months but still fell backwards!
The best part however is six months being smoke free shows you can still to a goal and you are actually making the effort compared to others who simply they would like to but..
simply end up fooling themselves only.
The lesson of the day is to say you've both done a great job so far but don't pat yourselves on the back too much. If you were only lighting for a couple of years this would be the major step. But for those who smoked many a year a few months can be a temp gap only and vaping for a bit longer will prove its own worth over time when you find you are even far less likely to ever fall backwards.
I don't have any plans for quitting vaping entirely here but don't have any interest in chain vaping either. Gradually it come down to a few secondary flavors only along with a primary.