I felt like this was unnecessarily critical. Poor front-end developers at Apple got a huge win and have switched to some really modern tools. But they get slammed for doing it wrong.
The tone might be critical but I think there are some positive takeways.
When I first started using SASS I was very excited by the prospect of nesting rules - finally, an easy way to have a high degree of control and specificity over the styling of elements - but I went over the top with nesting like many people starting out.
I think the interesting thing here is just how easy it is for even seasoned developers to fall into these common mistakes when using preprocessors such as SASS - I think it's endearing: rather than slamming Apple for doing it wrong I think it provides a good opportunity to promote discussion about common pitfalls with tools like SASS, and how to avoid them.