A specific definition of "popular" doesn't matter. What we can say is that Rust's market share at age 10 is lower than that of Fortran, COBOL, C, C++, VB, Python, JS, Java, C#, PHP, Ruby, TS, Kotlin, and Go at that age, but it's bigger than that of ML, Haskell, Erlang, and Clojure at that age. I don't know if I can compare its market share to that of Ada at that age. I'm nearly certain that much larger (and definitely more important) programs were written in Ada circa 1990 than are being written in Rust today, but it's hard for me to compare the number of programs.