The only advantage is clocking in on time and leaving on time, but officially prohibited communication apps continue to be used for work contact after hours.

There are too many to count, like stars in the sky. In addition to the points many others have shared above—having to press a light and explain whether you are going to the restroom, attending a meeting, or getting tea; saying that mobile phones are forbidden at work while the boss does the opposite—the most important issue is that they fire people without hesitation and without prior notice. They completely treat people as people.