[gok]

macOS makes the 64-bit transition a bit harder than that because a lot of the older user space APIs were purposely not ported to 64-bit. If your app was written against the Carbon APIs, you have to do a fair amount of work to change all the GUI code.

[duskwuff]

Yep. But developers have no excuse for being late to that show -- Carbon was always explicitly a transitional technology, for a transition which ended over 10 years ago. Warnings have been plastered all over the documentation for ages.

[x0x0]

There's something to be said for the MSFT approach of your code will run forever. I understand there's tradeoffs, but there's something to be said for it.

Pointing a bunch of whiny users at devs -- some of whom gave code away for free -- is not awesome for the ecosystem. IMO.

[tinus_hn]

Not awesome in the short term, but better in the long term.

[noisem4ker]

Backwards compatibility is a very tangible benefit in the long term.

[gok]

Truth.