This isn't the default jpeg library. That's libjpeg. In this case, the `jpeg` bit isn't as interesting as the `-turbo` bit. Keeping up with the fastest way to implement JPEG on new architectures and CPUs is worthwhile.
> In 2019, libjpeg-turbo became the ISO and ITU endorsed reference implementation for the JPEG format. [13]
The paragraph that follows might help to clarify why this happened.