Confused, aren't they losing memory safety?

I get for certain core code situations, you want to manage all memory safety yourself (or use built in static GC), but beyond that it seems to me at a higher level you'd rather have the automatic GC. Why burden all of your developers rather than just a core few?

I don't think GC issues is a compelling argument to move everything to Rust. I'm not saying there aren't compelling arguments, but that just seems a bit odd that that's their main argument.