Macs are transitioning from Intel to Apple Silicon. Why? And why now?

Are Intel-based Macs still worth buying?

Apple announced at WWDC 2020 that it will make yet another big transition on the Mac: Away from Intel processors, welcoming Apple Silicon. A little more technical: Away from x86_64, welcoming ARM64. As an effusive user of Apple products, some friends and colleagues asked me some questions about this topic: