From the mDL pilot program website [0]: 1. Continue to carry your physical driver’s license or state-issued ID card. Law enforcement, state government agencies

From the mDL pilot program website [0]: 1. Continue to carry your physical driver’s license or state-issued ID card. Law enforcement, state government agencies, and businesses aren’t yet accepting the mDL. 2. The mDL is currently authorized for limited usage. There are many participating airports across the United States. Right now the only main use case is tap-and-fly (can I make this term a thing?) where you don’t need to present your ID to TSA at select airports. Also, it has a nice design and looks cool. The best use case is probably that it can work as a backup if you forget your ID at home when you’re trying to board a plane, or if you want to simplify what’s in your pockets prior to boarding. [0]: https://www.dmv.ca.gov/portal/ca-dmv-wallet/ https://www.dmv.ca.gov/portal/ca-dmv-wallet/