37 years ago I had the chance to shot a 85lb compound bow with carbon fiber arrows (this is the early days of CF).
Amazingly shot through cement blocks, however the slightest scratch caused arrow explosion (extreme injury for the shooter). Fibreglass arrows very rarely suffered this type of failure, even with damage. I was lucky enough to never experience this.
Windsurfing masts show similar issues as others have posted.
Ski poles, unless you need light, and don’t danage your poles skiing CF is a bad idea. Similar issues
The real issue with CF is not that it fails but that there is little or no warning of failure. It is either solid or its not. Its not like other materials the have some indication of imminent failure.
Back to arrows, CF disappear from the market for several years before returning redesigned. Less failure, stronger, stiffer and lighter. Besides that, end users are now aware of the risk and retire them at a certain point.
Cyclists need to learn CF has a cost (even if extremely expensive) and that cost is retirement vs buying/selling used for CF bikes is not an acceptable solution.