Not entirely sure about Obj-C version.

Disagree regarding frameworks, though. The newer snapshot-based APIs for NSTableView, NSOutlineView, and NSCollectionView (added in 2020 as part of macOS 11) are a massive improvement over the old index-based ones for example, and there’s been numerous polish and quality of life improvements scattered throughout.

Also disagree about Swift if only for the large number of things it comes with out of the box that’d require a third party dependency with Objective-C, but so many more errors being caught at compile time, no need to maintain header files, and no awkward split between C and Obj-C for basic types are nice too. I still enjoy Obj-C for some types of projects but as project complexity increases so too does my preference towards Swift.