I know that, but there's a difference between those who do, and those who talk about it.
And all I see here is those who talk about it.
And all I see here is those who talk about it.
That's because here is not the official mailing list of either Rust or Swift. DUH!
And even here, 99% of those who comment, don't talk about for the envy/war reasons that you attribute to them.
In fact you're one of the very few to bring up this BS rivalry thing.