It's a lot better than being murdered, of course. And it's better than say twenty years. But this still isn't saying much, right?! There are no good answers here, only less-bad answers. The whole situation is a tragedy all around - one which arose out of a fucking traffic disagreement.
Which is why fundamentally we need to move past this societal obsession with "solving" problems with firearms. The dynamic of firearms is pure spite - they make a bad situation for you into a slightly worse situation, while making it much worse for the other guy. And while this is a necessary dynamic in some situations, it is most certainly not a first-line answer of how one should be approaching every little difficulty. (a traffic disagreement!)
But yet we've got mass media that demonstrates them as if they're some kind of simple "remote control" for other people. "I've got the gun, now you do what I say". "Oops, now you have the gun, I have to do what you say" and on and on and on. Obviously this is quite idyllic compared to what ends up happening in the real world.
(Note to any reflexively-downvoting gun-thumpers: I'm not actually arguing to make firearms illegal or anything! I'm a gun owner myself. They're a tool - a tool whose dynamic has been poorly understood in popular culture)