Seems to me that anyone under age 25-ish has headphones permanently grafted to their ears. I exaggerate a bit but like young people rarely forget their phones because they notice within a few minutes that they don't have it, people are increasingly using headphones so much that they will not need to remember them.

My kids were constantly losing wallets, money, credit cards, keys, drivers licenses, etc. but none of them ever lost a phone. I expect headphones will go the same way soon.

For older folks, yeah. I often leave the house without my phone, because I go for hours at a time not using it.