[say_it_as_it_is]

Correct. They wouldn't have considered Rust if the GC was performing better. They also wouldn't have even adopted Go if Elixir was sufficient. This team seems to have an incredible talent pool who is willing to push further for the sake of, as you say, delivering business value. Improving UX, investing in capabilities for growth, are valid business reasons why they're iterating over so many solutions. It's really impressive to see what they're accomplishing.