I do not plan on buying a BEV in the next 5 years. But I do plan on buying a PHEV (for simplicity, I'm including EREVs under this term - anything that can cover my commute without gas, yet has a gas engine for long trips is under consideration).
My '12 Leaf is one of two cars for my family. It is more than sufficient for all of my local driving needs. The 30kWh battery would only just slightly improve that for me.
My focus is now to replace the hybrid ('10 Honda Insight) with a PHEV so that both cars can drive locally without gas. It bothers me that I still burn gas every day (albeit very little). Although the Leaf can handle either commute, my wife and I go in different directions. So one of us has to take the hybrid.
Financially, I am trying to stick to at most one car payment at a time. I bought out my lease with a 3-year loan in 12/14. So in 12/17, I will be in the market for a PHEV. Currently only the CMAX Energi is large enough for my family, but I'm hoping that Mitsubishi will get their act together and bring us the Outlander PHEV by 12/17. And who knows, GM could release a crossover Voltec as well. (Yes, I know the Insight is a compact car, but every other PHEV on the market has LESS trunk space than it - I consider its 16 cu. ft. trunk to be the bare minimum) Whatever it is, it still has to be able to travel 350 miles during the winter with the heat blasting. I don't mind stopping to charge, but I doubt the infrastructure will be mature enough in 2017 to rely on.
I am confident that, short of a catastrophic failure, my Leaf will serve me well until about 12/20 when the PHEV is paid off. By then, I should be able to afford a 200 mile (EPA) BEV. Also, by 2020, it will be clear which quick charging network(s) are dependable and robust.
With any luck, I will finally rid myself of gasoline in December 2023, when I replace the PHEV. It seems like a long time from now, but really it's only 8.5 years. In the grand scheme of things, that's pretty quick. In the meantime, I am burning very little gas, with very few compromises. AND I am not jeopardizing myself financially by purchasing many cars in rapid succession.