[dep_b]

ARC is nicer than GC and more predictable but in terms of performance for stuff like audio raw graphics processing and so on you still want to use something more low level like Rust, C or C++.

One of the reasons iOS is more smooth than Android there's no "OK I'm going to GC a million objects right in the middle of your scroll" performance dip but it will release all objects more gradually through ARC at a slightly bigger total performance cost.

Ask C devs why they (still) think Swift is a PITA to work with compared to Objective-C. Luckily in most scenarios you can use Objective-C mixed with Swift to get the advantages of both scenarios.