It made me wonder just how far back non-comedy female assassin/spy/secret agent movies go. The earliest examples of this being mainstream that I can think of off the top of my head are La Femme Nikita and The Long Kiss Goodnight, both of which are 1990s movies.
So it has been a good 30 years, and there is now a lot of movies of that kind, from Salt and Red Sparrow to Elektra and Peppermint.