I'll stick with "nails" for cigarettes. As to PVs. Well, I suppose I'll need a decent one before I can get picky on what to call them. lol.
Now I'm gonna tell on myself a bit.
Analog actually defines a term of progression or evolvement. This being that "analogue" and "analog" have been around since long before "digital". Viewed in light of physics, an analog of anything is either a sample of something, or a replacement / stand-in for something. USUALLY. Transmission of voice via radio waves creates an analog of the real thing. Recording a voice to vinyl, or more modern media, creates an analog of the same. Take it to it's modern usage and it's taken on new meaning to the world at large and is now in fact a progression of it's self, an analog. OK, bored you to death, sorry. Just interesting to look back on what a thing started out being and through generations, what it has become.
Take the "archaic" cassette tape. This was an amazing marvel as I recall. Let alone, CDs and digital files stored in varied and broad standing ways. If you'd have told me that analog would become the opposite of "digital", I'd have first asked you what digital was, then I'd have laughed at you in your futuristic fantasies. Imagine what I'd have said to the idea of a pocket computer!
I recall building my first computer from plans that came out of the back of a popular science magazine. It had 4 d-switches, 5 lights (akin to LEDs) and NO monitor. You entered a series of on/off commands via the switches and the computer would compute (calculate) your inputs. It was up to you to read the lights and take your computed (calculated) output. A short time later, Texas Instruments fascinated me to an extent I thought we'd all be amazed for life. They sold this little brick looking thing with a block type red LED readable display. It took a 9v battery, you entered your mathematical formula via actual number buttons and could read the data output as actual numbers. Yup, the calculator. I still have mine, all $100.00 of it. lol
Long story short, the english language lends it's self to change as even it's most basic rules of formulation have more exceptions than the average person can name. To me, the e-cigarette is an analog of the real cigarette, but definitions have moved far past where I sit, so actually................. everybody's right. Doesn't mean us old fogies have to keep on changing though. L O L
Wonder how bad I've told on myself now. ;-)
Frank