I don’t recall ever struggling with NSTextView. I never really got into Swift, but I’ve never found Cocoa / Objective C to have any of the problems the author mentioned.

Not exactly sure what “streaming” text is, but serial terminal software has been handling incremental text rendering and updating for decades, without performance struggles.

`NSTextView` is good. My point is not that `NSTextView` itself is bad. The problem is that once you are working with all the "modern" Apple stack (Swift, SwiftUI, and the direction Apple is clearly pushing developers towards) `NSTextView` does not fit as naturally anymore. Some newer APIs are not even available for AppKit now, so you quickly end up in an awkward middle ground.

By "streaming" text, I mean a formatted text stream that has to be parsed, formatted, and appended on the fly - basically how every model/AI chat works now. And this is where `NSTextView` becomes tricky. It forces an interesting architectural choice: either go deeper into AppKit with `NSCollectionView`, custom cells, manual layout, etc., or fight the whole SwiftUI model by embedding something like `NSTextView` inside `LazyVStack` / SwiftUI views & then dealing with all the integration problems.

So I am not saying Cocoa / AppKit was always bad, or that `NSTextView` is useless. I am saying that for modern chat-style UI with incrementally rendered formatted text, it does not compose well with the rest of the modern Apple stack.