> Can Rust replace C or C++ yet, atleast for green field projects?

Mozilla has been replacing parts of Firefox C++ with Rust for a decade. They recently celebrated Rust hitting 25% of the LoC in the main repo. More broadly, serious code at large companies is written in Rust: A chunk of Google's Fuchsia OS, Dropbox's storage engine, Amazon's VM manager, etc. There are niches where C/C++ are better suited but in general Rust is good for whatever if the team wants to use it.