Perhaps this measure is useful to something but I find it directionally annoying as I don't think "higher is better" as it would be with the more traditional metric.

Here's an example from the page - a couple and the wife's parents - a couple and their college grad son

In this example the two couples (4 people) are counted as home owners and the 3 others (wife's parents, the son) as non owners - so the ownership rate is 4/7 = 57%.

On the traditional metric that scenario would be 100% because roughly each family owns its home which is good.

Now look at what would have to happen for the new rate to move to 100 - the wife's parents and the son would need to move out and buy separate homes. In other words the metric "punishes" living with family even if that's what you want to do.

I find the traditional metric is more useful. If I am a renter that indicates the desire to have a separate place - so it makes more sense to "ding" the ownership metric.