In my case, no electronics to fail, my batteries last way over a year, I can build coils around the wick of my choice at the ohms I need to produce satisfying vape for hours until I need to change batteries, and I like the performance, quality, and looks of the mods I've chosen..
I'm not into sub-ohm vaping.. Just low enough resistance to not tax my batteries, and produce smooth, flavorful clouds..

I do have a variable voltage ProVari when I do want to set the voltage, and maintain the same level of vape throughout the entire life of the battery when I'm in the mood though..

(also a REO bottom-fed box mod, and other mods also...

)
If you're happy with what you have now, stick with it. It's taken me almost 3 years of progression at this game to learn, and try different devices out to be where I am now.