I'm 66 now, and I have enough 100 mg./ml. rocket fuel in my freezer to last me until I'm 95.
I do some DIYing, and when the vapocalypse comes, everything I vape will be DIY. The FDA can't ban suitable flavoings.
I'm happy enough with Vision Vivi Novas and have about 100 of them stockpiled. I've learned to wind my own coils and will continue to make those until my coordination and/or vision give out. If that happens, I have about 300 heads stockpiled.
Finally, I have about 15 LavaTubes and Vamos stockpiled, but they have a habit of calling it a life in a year or two. So, I've embarked on a Provari buying program: one per month for the foreseeable future.
Eventually, 18650 batteries might become obsolete. If that happens, I keep dead LavaTubes and Vamos (it's usually the buttons that fail, while the other innards remain good) for building my own wooden mods to fit whatever kind of battery comes down the pike.
Am I missing anything?