CDC's MMWR using National Health Interview Survey shows adult tobacco use trends in 2017-2023:

"During 2017–2023, the approximate 6.8 million-person decrease in the number of adults who currently exclusively smoke cigarettes was offset by an approximate 7.2 million person increase in the number who currently exclusively use e-cigarettes....  While current cigarette smoking has decreased to the lowest level in 60 years, current tobacco product use among adults has not changed since 2017."