I understand "ecosystem/libraries" as code available for free. That a quick search online would convince most of us that it is trustworthy enough. That we hope

I understand "ecosystem/libraries" as code available for free. That a quick search online would convince most of us that it is trustworthy enough. That we hope won't require us to ever have to read, modify, and re-design the code. And if we are lucky has a state of the art abstraction for the domain it solves. So that we can get going with our task at hand as quickly and efficiently as possible. Under this light, Rust has now quite a large ecosystem of pretty good quality I would say. I have only written small thread safe system level libraries in Java. But I sure noticed that javac did not have a borrow checker ;) For webdev I had no problem with Rust async or not. But my definition of webdev is reduced to a web server that calls out to a database or another service.