[topspin]

> What is the benefit of having multiple compilers for programming languages?

I'll give you one, or two, depending on what you'd like to count. At some point in the conceivable future we'll be able to compile some meaningful Rust code base with both compilers and measure; a.) how long it takes to compile and b.) the performance of the compiled code.

Obviously that will induce what it always has: incentive to improve.