I've been done vaping for about 3 months now. It wasn't an absolute goal, but I did find that I could vape less and less (after getting down to 0 nic first for a few months) and then decided to just try and stop. It just seemed silly not to try and quit at that point -- the worst that would happen is that I'd go back to 0 nic vaping.
I also liked the idea of finally being beholden to nothing -- that is, not needing some sort of fix (even if it was just 0 nic vaping). I must say, it feels good not to need to spend money on something when I don't want to. It also leaves me one step further removed from cigarettes in that I no longer engage in that hand/mouth inhale/exhale activity.
Also, I notice a further improvement in respiratory health for being off the vapour.
There are good reasons to quit, but those reasons will be weighted differently for each person. If you're off tobacco, then you're in a good spot. At that point, experimenting with reducing nic/quitting, etc. can be done leisurely and with no pressure -- if you fail, you're just back to vaping. I would encourage everyone to try if only to gain some insight to what they actually need -- you might be surprised -- I was.