Disagree, having dealt with +40k LoC rust projects, bottow checker is not an issue.

Async is an irritation but not the end of the world ... You can write non asynchronous code I have done it ... Honestly I am coming around on async after years of not liking it... I wish we didn't have function colouring but yeah ... Here we are....

We all know that lines of code is a poor measure of project size, but that said, 40k sloc is not a lot