I bought a 1957 house and spent like $12k having it entirely rewired. Family thought I was nuts spending that much on something you can't see. But I don't want to die in an electrical fire. Plus, I needed some 220v outlets for my garage woodshop and redid the kitchen anyway.
It's like IT at a big corporation. People ignore it until it's a problem, don't want to spend the money. Then it's too late and you're fucked. Good thing it didn't happen when they were sleeping and take them with it.
Edit: This was not recent and I probably should of paid more. Don't expect to get an entire house rewired for 12k fyi.