If we keep using them the way we are now = yes.
That's like asking "Are you guys really scared of what will happen if we keep dumping toxic chemicals into our rivers and lakes?"
No.. the standard will change somewhat. Some things will be beneficial, some things will require we change how we do things.
Will it be a "drastic decline in the quality of life" ?? I think it will be a huge improvement.
I don't say this to offend you, I say it as a matter of scientific fact. Your reluctance to change is a function of your conservatism. Conservative brains process more information through a lobe in your brain responsible for processing fear and emotion. In fact, the effect is so extreme that it causes the fear processing center in conservative brains to become enlarged due to the higher number of neuron connections.
Here's the research:
The current tech level of our EV's are not ready to serve the needs and lifestyles of everyone.. Not yet, but we're getting there. That's the problem with a lot of "conservatives" who envision a world of electric vehicles based on our current models. And on that level, you would be absolutely correct. But everything has to start somewhere.. even the computer you are using started off as a useless, and ridiculously expensive toy.
And do you remember the first cell phones? ROFLMAO.. They could barely make phone calls, and you had to be located in the right spot.. get too close to a power line and the call dropped.. go under a bridge and the call dropped, and you could barely hear the other person on the line. And they were expensive and only the wealthy could reasonably afford such a luxury gimmick and toy. My parents had one, it would not pass muster by today's standards.. You would laugh at it.
All new tech starts somewhere.. the problem is that those who push the propaganda (mostly Koch brothers these days), will paint a picture that is entirely distorted.
Imagine no more oil changes, brakes you might only change once in the car's lifetime, the quietness of not having to listen to traffic..
Heck, I've been changing all my yard tools over to battery power and I absolutely love them. They're not ready for commercial level use yet, but they're getting there.