This wording keeps it from being confused with other terms that have been tossed out.
Leave it to California to get it right. The governor of California ordered his 40M citizens (other than essential personnel) to "Stay at Home!" A good call and timely at this point in the crisis.
I wish I had seen or read his announcement before I was on King 5 TV, the NBC affiliate here in Seattle. I would have used that term versus the several that have been tossed out by different leaders telling people to remain at home.
I expounded on my reasoning in an earlier blog post, Lock It Down. Lock It All Down Now!