I'm pretty cynical of the government. I mean, in NYC they have restricted the quantity of soda that restuarants may sell to individual customers, all in the name of fighting obesity. I don't have a dog in that fight myself, but if the government can do something like that, they can do something even worse with e-cigarettes because of the natural bad stigma of anything having to do with "cigarettes" without much public outcry from the general population.
The FDA gets its plates filled by lobbyists from Big Pharmaceutical and they have the most to lose from unrestricted e-cigarette and e-liquid sales. That group will do whatever they can to encourage the FDA set up the toughest restrictions they can.
As suspicious as I was about Big Tobacco getting involved, I'm now feeling they are more on our side of the fence. Both Blu and NJoy are both owned by tobacco companies and those two companies have a large investment in e-cigs now. Their budgets and lobbyists may be assisting our side in the battle. But market-wise I don't see the tobacco companies going any deeper into the e-cig market than the cigalikes, possibly into the eGo size systems down the road. The quick money with minimal overhead is in the beginner/mid-level market. I don't think they will get involved with the advanced PV's for quite some time. Mod's cost more money to design and manufacture.
Batteries, chargers, wire, and mesh are items that should always be available as they are used for other purposes than in our hobby.
I have 3 VV and 2 mechanical mods, over a dozen cartotanks, and one RBA. I've got about 2 months supply of cartomizers. I'm a little concerned about the future supply of cartomizers and other delivery devices should people panic and stock up/hoard these. If some vendors are not able to exist financially because of future restrictions, availability of disposable juice carrying devices might become sparse. That's once reason to be familiar with rebuildables.
I probably had a couple of month's worth of flavored e-liquid, and just ordered about $160 worth from my favorite vendor tonight. I did have a $25 gift certificate thanks to another ECG member who made a trade with me for some juice, so that helped soften the blow a little bit.
Anyone should be able to make their own eliquid if worse comes to worse. PG and VG are common pharmaceutical items not needing a prescription. Nicotine is going to be the really tough one. Hopefully it will only be regulated (and taxed) and not banned outright. I'm down from 24mg to 12mg nicotine at present; if I had to I might be able to get by without nicotine as long as I can still vape 0 nicotine liquid.
It scares me that e-cig use has been banned in places like Singapore, nicotine e-liquid has been banned in Canada, and have been banned in some counties here in the USA.