That is why it's always recommended to keep updating your phone if there is a new firmware update available for your phone and it seems that the Knox folder is not affected by this.
The newer the smartphone, the faster you will get the update, and vice versa if you have an older device that goes lower and lower on the priority list. In addition, if the update is not set to automatic, many people do not pay attention to such things at all. However, the biggest problem is those users whose devices stop receiving official support - I, for example, have not received any update for almost 5 months, and I have a device that is just over 2 years old and paid over 700 EUR.