> I am somewhat concerned about the volatility.
Not just volatility but also flip-flopping. Rust was explicitly a contender when they decided to go with Swift 18 months ago, and they've already done a 180 on it despite the language being more or less the same as it was.
They made a very pragmatic and sensible decision after reviewing Swift that it wouldn't be suitable for their purposes, so they shifted to the next best alternative. I think they reasoned it very well and made a great decision.
I guess they bet on Swift being more than Apple's blessed way of writing UI software.
It's not that they are loving Rust, but they realized going all-in on Swift means becoming sharecroppers on massa Tim Apple's plantation.
they tried swift, it didn't work, and they figured rust was the best remaining option. that's not "flip-flopping" (by which I assume you mean random indecisiveness that leads to them changing their mind for no reason)