Since I picked up a liter of 100 mg, along with the couple of bottles of 60 in the freezer I have somewhere around an 8 - 9 year supply. Realistically I've gone 0 nic before and it hasn't bothered me -- it's been long enough that I truly just trade vaping nicotine against coffee consumption.
I use natures flavors, so that doesn't hurt my head. The only non-NF I like is some tobacco blend for my vanilla tobacco. OTOH it wouldn't hurt my head to go to straight vanilla for my ADV, or substitute a pinch of caramel perhaps.
Mods, I expect my 3 Buzz Pros will last until the heat death of the universe

I've also got 4 mechs from the last handful of months -- very solid devices, few parts to go bad. Then I have some cats and dogs modern VW/TC -- happy with what I have, and similar to flavors it wouldn't hurt my head to drop back to the mechs.
Tanks,I have doubles of the aromamizer, tfv4 mini, avocado 24, plus a few singles. I roll my own coils, have a good stock of what I use and am confident that basic kanthal won't disappear (non vaping uses).
Net, for me personally deeming doesn't hurt, but I really hope that the grandfather date gets rolled forward (Cole-Bishop) so others don't get shafted.