Is Romex wiring still used?

Yes, Romex wiring is absolutely still used and remains the dominant wiring method for residential construction in the United States today. Romex is a trade name owned by Southwire Company for Type NM-B, non-metallic sheathed cable, and it has become the generic term for this type of cable just like Kleenex for tissue. It is the standard for almost all new single-family homes, apartments, and residential remodels because it is inexpensive, fast to install, flexible, and approved by the National Electrical Code for dry interior locations. Electricians pull miles of 14/2 and 12/2 Romex every day for lighting circuits, receptacle circuits, and small appliances. It is available in sizes from 14 AWG to 2 AWG and in 2-wire and 3-wire versions with ground. While there are other wiring methods such as MC cable, AC armored cable, conduit with THHN conductors, and UF-B for outdoor use, none have replaced NM-B for interior residential work due to cost and labor advantages. It continues to evolve, with modern NM-B now featuring 90-degree Celsius rated conductors, color-coded jackets for easy gauge identification, white for 14 gauge, yellow for 12 gauge, orange for 10 gauge, and improved PVC jackets. It is not allowed in commercial buildings over three stories in some jurisdictions, or in wet or exposed locations, but for houses it is still the default choice for every electrician and is readily available at any hardware store.