We discussed this previously and I've been experimenting with it for a few months.
Every 3 months or so I mix up 500ml of my tobacco ADV and have a supply of 6 month steeped juice. I tried a zero vg mix and it steeped far too quickly and spoiled the taste a bit.
A month ago I made one using half the vg, and it's now at the same stage as a 6 month steeped batch and tastes perfect. I've now topped it up to slow the steeping.
A lot will depend on how much flavouring and nic is used and we will all get different results, so it's a case of experimenting with each mix but there is definitely some benefit to it.