"the company looked at the history of social media over the past decade and didn’t like what it saw… existing companies that are only model motivated by profit and just insane user growth, and are willing to tolerate and amplify really toxic content because it looks like engagement… "
I am a dev, but not a Rust dev.
Rust, Go, and C# look like the future to me. Everyone is moving to strongly typed, explicitly typed languages for a reason.
Rust is as fast as it gets, and much much safer and easier than C or C++ at the cost of slightly odder syntax than higher level languages.
Microsoft has done great things with C# and open source and multi-platforming. It’s the easiest, quickest, safest way to develop business applications. The performance is really pretty good until you compare it to Rust.
Go is between the two, but probably a little closer to Rust.
Other languages will stick around the same way Fortran has still been in use despite being deprecated for 30 years. But really nobody should be developing anything new in PHP.