Lane! I meant lane!
Well, I wasn't kidding when I said the Tesla ruined me. That said, I'll give it a shot.
The obvious plus about the Volt is its price. The Tesla would have been a loan, but I paid cash for a used Volt.
I'm also back into trying to drive super-efficiently. I don't like having an engine running, even if I have one. Even though the Volt is the best PHEV out there (I don't really count the i3 REx as a PHEV) in terms of range, it's still only rated for 38 miles, and in the recent cold, I've been getting more like 30-35 miles on a full charge, mostly keeping the climate control in "Fan Only" or "Eco" modes unless I need to run the engine anyway. Unfortunately, I seem to tend to drive more like 40-50 miles total when I go somewhere, so I haven't been as gas-free as I'd like. I need to start finding places to plug in away from home again.
As far as Volt vs. Model 3: The Volt is WAY more sluggish in accelerator response, of course. The Volt's overall handling is pretty good, but still nowhere near the 3. The Volt beeps a lot more, and not really in helpful ways: The Tesla only beeped if you were about to hit something. The Volt beeps like crazy every time I put it into reverse, which is completely unhelpful. The reverse camera is OK, but it's a worse resolution being displayed on a much smaller display than the Tesla.
Controls: Holy cow, Chevy just vomited buttons. freaking. everywhere. There must be 80 of them just in the center stack, plus a dozen buttons and two wheels on the steering wheel, more on the left, some on the door, there's even buttons in the front of the door pocket! One of those is to release the charge port door, which confuses me. Is someone going to pour sugar into my battery or something? The Tesla's charge door can be opened from the touchscreen, from tapping on the door itself, or by pushing the button on the charge plug if using a Tesla charger (whether it's a portable or permanently installed one, or a Supercharger) and it closes itself a few seconds after you unplug.
The ergonomics of the 3 were also better. The controls were all within easy reach for me, holding the wheel left my arms in a comfortable position, and I never had to move anything more than my arm. As I'm tall, I tend to have to have my seat pretty far back, and the center stack buttons are at the limit of my arm's reach in the Volt. I have to either lean forward a bit or twist a bit to reach the touchscreen and some of the other buttons in the Volt, whereas the entire touchscreen and the few other controls in the 3 were all within easy reach.
The UI on the Tesla was much cleaner. The Volt has a million little things up in its display all the time, and it seems like most of them are given equal "weight". I find myself having to search for several seconds sometimes to find a particular indicator for a parameter I want to know in the Volt. In the 3, things were much cleaner and the most important things had the most emphasis on the screen. I'm also finding that the Volt doesn't have the ability to show some things I'm interested in, particularly engine RPM and temperature. Comparing to a more, uh, comparable vehicle, the Ford Fusion Energi I used to have had a much cleaner UI than the Volt, and it showed more too. It seems like the Volt's UI was designed to look cool when you check it out at the dealer, but real-world usability suffers.
I don't want this to come across as the Volt being a bad car. It's not. There are quite a few positive aspects to it, and it's a great stepping stone into EV driving and a great compromise vehicle for those who can't make a purely electric vehicle work for their mission. It's not even really a fair comparison. The Model 3 just simply out-classes the Volt in every way.
There's a definite "knee" in the drag curve around 80 mph, as well. I found this to be true of the i3, too. It's probably true of most any vehicle, we just don't notice it as much in a gasser because it's not giving us the detailed information on energy usage that EVs do.
I just noticed in the 3 that I was pulling my average above 300 Wh/mi when I went over 80 (probably about 85ish), while just parking the cruise or autopilot at 79 brought me back down into the 250 Wh/mi range.