I rarely carried a backup for years. One time a friend asked me a question.

"What are you able to do to protect your family?"

Not what you are 'willing' do, but what are you 'able' to do.

It got me thinking...what do I do if my primary weapon fails, is taken away, etc...

I now carry a S&W 642 as a backup. My wife carries one as well.

When I was in the military, my commander told me this...always have a plan B. When the shooting starts, plan A gets thrown out the window. Resort to plan B.

Everyone should have a backup.