Turning to ‘Live demonstration’, the authors have a very nice discussion of the fact that aspects are changing, but that most of the beginner stack is stable. The authors then talk about a recent exception with GitHub changing from ‘master’ to ‘main’. I wonder if there might be value in also providing an example of something that hasn’t changed here. And then also adding an example of something that is particularly unstable (even if it might be slightly more in the intermediate stack).
I don't immediately see the added value of this.