> Honestly I'd be a bit disappointed if something better came along tomorrow.

You'd be disappointed if something 10x better came along tomorrow? I suppose you would you also be disappointed if magically we had economical fusion power, because you own utility stocks? Or we invented 10x better new car, because you already own an old car?

Of course the world wouldn't immediately move to one thing or the other, etc., and we'd still have a 10x better thing?

> Obviously I want better languages to come out, but I'd either want a bit of warning or a slower pace

The purpose of this thought experiment is to say -- it's perfectly fine for things to live and die, if they must. We've had a second Cambrian period for PLs. It's perfectly alright if some don't live forever, including Rust, which I really like.

In my thought experiment, Rust and C could also accept this new paradigm, and adapt, and perhaps become 10x better themselves. Though this is something heretofore C/C++ haven't done very well. IMHO new things don't preclude old things, and there mustn't be only one winner.

> Thankfully languages need about 10 years to mature from 0.1 to production readiness, and industry happily ignores marginally (and moderately) better languages

Which my thought experiment did as well? Read: This is a 10x improvement!