Apps. They have distribute bunch of tools written in does language. For example an electron app for nodejs. On top of that bunch language PKG manager are not made for final distribution, mainly for development. Pip does not have an uninstall. This is worse in Lang's like rust, go, Haskell, nodejs where ecosystem design is not really compatible policy of these distros. And rust and nodejs comes in wierd locations so it can eventually needed in base system.