Always. When seatbelts first started becoming common, back in the 1960s, it was unusual for people to use them, but my father somehow got me started on the habit.
Once in the mid 1980s, I had a rental car while my car was in the shop. Its seatbelt was finicky and wouldn’t always let me pull it out, so the morning I was returning the car, I started driving away from the house without it. I felt like I’d gone out without a shirt on. I pulled over, fiddled with it a bit more, and managed to get it to extend so I could use it.
I’ll even buckle up in NYC taxis, which can be a challenge sometimes (finding the belts and getting them extended / fastened).
Re “Holy crap, I’m glad I/<whoever> was wearing their seatbelt that day!”, we have two stories, one that came close to being tragic for one passenger.
The first one was going out to dinner on our 10th wedding anniversary. Reservations at one of the finest restaurants in the area, which required driving on some winding country roads for a bit of it. It had rained earlier that day, which was why as we rounded a bit of road with a curve to the left, the rather large Chrysler LeBaron convertible coming the other direction lost control - and hit our Honda Civic head-on.
I have never done recreational drugs, but I cannot imagine that any rush feels better than that moment after the impact, when you realize that you are not only alive, but uninjured.
In a “there just might be a deity up there” moment: the other car was occupied by a couple of late-teenage boys. The passenger told us he had not been buckled in, when something popped into his head saying “getting to some curvy bit of road, better fasten the seatbelt”. Within 5 minutes, he was very, very glad he listened to that inner nudge.
That Civic was actually repairable, and we got another 5 years out of it, which led to our next “glad” story.
My husband was driving home from work. Another rainy day (see a pattern here?), and he was slowing down on the ramp at the Beltway exit nearest the house. It being rush hour, there was a pretty substantial backup on the ramp. It being rainy, stopping distances were longer than usual, as a fellow 2 cars behind him proved the hard way.
4-car pileup - my husband was in the second car from the front. 4th car caused the whole thing: hit 3rd car, knocking that one 2 lanes to the left (i.e., from ramp, to second lane from the right) by making it bounce off my husband’s car. Then the 4th car hit my husband’s car. One or both of those impacts pushed his car into the first car of the pileup.
My husband wound up basically lying flat in the car (apparently seat backs are designed to fall backward in some impacts); the worst part for him was that his glasses were knocked off by the the impacts and so he couldn’t see for a minute or two.
Luckily, a co-worker happened to be driving by and spotted his car, so the co-worker stayed around and drove him the rest of the way home.
The car was, of course, totalled - it was towed to a storage yard, we went to retrieve personal belongings, and could not even get the trunk the whole way open. There was a visible crimp in the middle of the roof, i.e. severe damage to the frame, rendering the car structurally unsound to drive even if the rest of the body damage had been fixed. Fortunately, the insurance company didn’t quibble. The driver at fault was probably hating life for several years after that, as 3 of the 4 cars involved were totalled. I imagine his insurance rates were bumped up a bit (I wonder if “accident forgiveness” extends to a 4-car pileup!!).
Since there is no constitutional right to drive, there can be no unconstitutional abridgement, wild or otherwise. Driving on public thoroughfares is a privilege and can be regulated by the states as they see fit. You are welcome to believe those laws to be unnecessary, but they aren’t unconstitutional.