[RetpolineDrama]

Swift 6 is only painful if you wrote a ton of terrible Swift 5, and even then Swift 5 has had modes where you could gracefully adopt the Swift 6 safety mechanisms for a long time (years?)

~130k LoC Swift app was converted from 5 -> 6 for us in about 3 days.

[jamil7]

Yes and no, our app is considerably larger than 130k LoC. While we’ve migrated some modules there are some parts that do a lot of multithreaded work that we probably will never migrate because they’d need to essentially be rewritten and the tradeoff isn’t really worth it for us.

[isodev]

It's also painful if you wrote good Swift 5 code but now suddenly you need to closely follow Apple's progress on porting their own frameworks, filling your code base with #if and control flow just to make the compiler happy.