This gets into whether or not the assets are collectible

In Texas, for example, your entire homestead, one car for each licensed driver in the household, $30K in personal property, retirement accounts, 529 accounts, most insurance, annuities, pensions, and a smorgasborg of farm animals. And your wages can't be garnished.

There's plenty of people in Texas with million dollar homes who would be pretty difficult to collect on.

That being said, the downside of being kept in a suit where your insurance company is defending you is low compared to the downside of having your assets taken from you. If you're unsure, the extra couple hundred bucks a year for an umbrella policy is probably not a bad decision.

I just don't think there is any firm rule to go by for this stuff, and reject the idea that anyone can say what sort of product is a "must" without getting that fuller picture.