It's not a Max, but it's extremely clear that the 737 is an outdated aircraft family. It's not directly relevant to this crash, probably, but it makes me a bit sad that we can't find our way out of this kind of local minimum.

The 737-800 was launched in 1994, which is not old at all by aircraft standards. And it is in the top 5 lowest crash rates of any airliner.

The 737 family is from 1967, so it's fairly old.

and some cars are fairly old too (pick any long-running somewhat-consistent model for a fair analogy), but they've changed since inception to be safer, more efficient, more reliable, etc. (minus the max, that's shoehorning something new to an old family)

Simply saying the family is old does not do it justice. It's possible for some "old" setup to continue to be effective even if other things change.

GP didn't say it was. They said the Max was just a symptom of a larger problem.

After the Max crashes, there were reports of sloppy production in Boeing factories. If those were correct, it's conceivable that other planes would be affected.