I try to get by with slice() since it is simpler to understand. Semantics is "taking a slice". splice() has a meaning of not only splitting but also putting slices back together, and is used less often. I too always have to look up its definitions from docs, partly because I use it so infrequently.

Oof same, I'm always going back to the docs for these

I somehow remembered that with : splice is more „evil“ because it changes the original. I know, it makes no sense ..