Here's what I've observed over 40 years of driving & 32 years of handling accident cases.
I was never a fast or aggressive driver, even as a newly licensed teenager I drove like a little old man. There was a time when if you 'followed the rules', that being staying in the right lane for example, you were left alone to drive the speed limit without being hassled.
Today, the psychos that used to spend all their time trying to kill each other in the left lane now treat all lanes as though they're passing lanes. You get no quarter in the right lane, you, to them, are just as much of an asshole for not doing 90 in the right lane as you used to be when you pulled that bullshit in the left lane.
So yes, humanity as a whole has gotten far more aggressive over my time driving. Does it make a difference what vehicle I'm driving, weekend TJ or daily driver Subaru in my case, I don't think so, if anything I experience more aggressiveness in the Subaru but that's probably because that's what I'm in during the work week as opposed to the TJ which I'll typically be in on the weekends, and in far less congested country road type settings.
This all bears itself in the cases too; I couldn't begin to estimate the number of people I've represented over the decades but I can certainly say that the needle has moved from what I'd consider accidents caused by standard negligence (aka carelessness) to a more aggressive intentional act based form of causation (aka recklessness) over the decades. I'm not saying people are intentionally crashing into each other, rather they're intentionally engaging in conduct that is legally considered reckless, & that always amps up the probability of causing collisions.
One last observation, yet another of the myriad unintended consequences of our ridiculous reaction to Covid is a further aggravation of reckless conduct along with a component of hit & run behavior. Hit & runs have always happened, but they were rare. They're now so common as almost to be expected. I'm not sure if it stems from this overall increase in rage people have harbored since the initial lockdown 3 years ago, or, that so many more people are uninsured because of the way we slaughtered our economy as part of our brilliant strategy to prevent the spread of a virus that had a 99% survivability, that they're leaving the scene of accidents because they fear the consequences of being uninsured. It's probably a combination of both I'd guess.
I don't know where this is all going, but it's not on a good trajectory.