C and C++ also have light stdlibs from my point of view, just like Rust.

Rust has collections, strings and algorithms manipulating these. It supports synchronous IO (files and network) and can work with threads/processes. It lacks async IO, higher level network protocols (e.g. HTTP and TLS), regex, advanced unicode support, serialization, UUIDs, GUI, linear algebra/vectors, logging, encoding, time, randomness, command line parsing, cryptography, compression.

C++ has reasonable randomness and time support, but apart from that Rust isn't far behind.