I don't think that the whole ecosystem should be dominated by a single VC backed startup.

I want my tools to be interchangeable and to play well with other choices.

Having multiple big players helps with that.

Maybe I'm wrong on this, but I rather have 1 tool everyone else is using. Cargo in Rust ecosystem works really well, everyone loves it.

Imagine if Cargo was not first-party, but a third-party tool belonging to a vc startup with zero revenue.

Then that startup makes rustup, rustfmt and rust-analyzer. Great, but I would be more comfortable with the ecosystem if at least the rust-analyzer and rustfmt parts had competitive alternatives.