Yes. It was something you said. You're still showing an attitude that frankly, is annoying. Why would I need to show you "proof" of anything? I have no need to convince you you should drive an MX-5. If you want one, get one! If you don't want one, don't. If you'd like one, but are concerned that it's not a good fit for you, then ask the relevant questions, and if someone has the answers, they will answer.
The MX-5 makes a great daily driver for my mother, who has driven on a track once, and has no desire to do so again. The MX-5 carries everything she needs it to carry (and it carries a lot more than many people realize). It's fun to drive, on the street (at least when you're in Austin and have fun roads to drive regularly). It's relatively efficient (it's not great, but few cars are as much fun, convertible, and offer better fuel mileage). It's also reliable and durable.
The MX-5 is great for my needs, too. My needs are not that different from my mother's. Rather than having fun roads to drive where I live (I miss Austin), I track regularly. As a result of my track time, sometimes I need to carry more than the car holds. But the car can tow a trailer. When I want to bring a set of race tires, I put them on the trailer and hook it up. The car handles this well. I've also used the trailer to carry significantly more cargo than the MX-5 can hold without the trailer.
As to the car's ability to handle snow and ice, generally, the car's great handling balance mean poor surfaces aren't much of a problem. While grip may be low, the good balance and the good feedback means the driver can still maintain control. It's not difficult to drive in low traction situations. However, the car's clearance is very low. It's poor on dirt roads that have significant ruts - it can't clear the center hump and must put one tire on the hump and one on the side of the road. It's poor in unplowed snow for the same basic reason - it doesn't clear the snow. If you need to drive on ice and plowed snow regularly, winter tires are a must. Anything you can do to increase grip on a car with two drive wheels, instead of four, especially when it's relatively lightweight, is a good thing. If you need to drive on unplowed snow, or if you're somewhere with nasty winter weather, it's not a good only car.
But for a single adult who doesn't have to deal with regular snowstorms or other additional considerations, it's great.