Not sure. I think it has a problem many languages have - too small a community. There is a lot of fragmentation in the last some years, I am not sure why, not just about nim but just look at how ruby has been dropping like a hot potato in the last ~3 years or more. I am so out of the loop that I could not even tell anyone what the young people are doing. Are there more who program than before? If so where do they go?
My students (18-21) are excited to learn Rust in my class I teach about programming languages. Younger students are learning Luau via Roblox -- spoke with a middle schooler on Sunday who was making games with his friends. They get introduced to Scratch in school and learn that until they move on to Java at middle and high school. I teach freshman Lua in their intro to engineering class, and they also go on to learn things like R, Matlab/Simulink, Python. Java, C, and C++ if they're a CS major.