Nim can be used for a lot of stuff; anywhere you'd use C or C++ you could use
Nim. For data-science stuff, Nim as a programming language is a very good tool (
@vindaar wrote his thesis in Nim for example), the problem is that the ecosystem
is lacking compared to Python or C++ so it ends up being more time consuming to
write data-science in Nim because you usually first have to take the time to
write bindings for the libs you want to use (we've started some effort at
https://github.com/sciNim/ but we haven't had the time to be as active as the
previous years  and definitely not as active as we wanted to )