In the long run DIY will be the norm.
People like convenience and most won't do more work than they have to. For evidence, look at how much shelf space in a typical grocery store is dedicated to pre-made or otherwise pre-processed foods. Sure, you can buy everything you need to bake a loaf of bread yourself, but most people choose not to. The ones who do are "enthusiasts", very similar to the vapers who hang out here.
Government tobacco control exists to collect taxes. We are going to make them irreleent. E-cigs give us tobacco control.
E-cigs themselves don't do that, and neither do DIY skills, but a freezer full of nic would go a long way toward that goal for an individual. Unfortunately, I fear those of us who've made those preps are a very small fraction of vapers.