There’s a remote risk of this catastrophic failure happening due to bad maintenance, installation, or building, but there’s no risk of this happening due to normal rotation/swing. In other words, assuming the machine is in good working order and used for realistic applications, this will never happen.

Here’s a video that explains how excavators achieve infinite swing angle without tangling the hydraulic hoses that go to the motors in the tracks. The dude in the video knows his stuff.

youtu.be/oUVE2PIV5_k