Astral did something similar for the Python ecosystem (Rust-inspired tooling built in Rust, replacing a lot of pre-existing - bad - tooling) & the impact has been revolutionary. Python had some of the worst tooling of any popular language & now has some of the best.

Composer is one of the best package managers in any language ecosystem but beyond that, other PHP tooling, while technically well maintained, aren't particularly great at what they do. It's an ideal starting point for positive disruption.