I hope you are right about the SCOTUS, Glenn. I really do.
I don't think we should debate whether 10+1 is enough, but here are my thoughts: Everyone should make their own decision about the appropriate defensive solution. Most of the time, I carry 15+1, without a reload. Sometimes I carry 6+1 with a reload. And sometimes I carry 17+1 with two reloads. --All based on risk assessment and what I'm able to conceal and carry comfortably.
A couple of years ago I was carrying a G43 with a reload, and three carloads of tweakers arrived at my family's backcountry picnic site and blocked our vehicle while they searched for their lost "stuff". I spent a few very tense minutes with my hand under my jacket telling them to leave. It did occur to me that I might not be sufficiently armed.