Sony has released a new minor firmware update for the PS4, updating the system software to v10.01. The update improves the system performance, and comes only weeks after a somewhat major update to the PS4. This is an optional update, so you can continue to access the PlayStation Network without installing it.
The update may be mandatory if playing some newer games. You can checkout the PS4 Firmware 10.01 release notes below.
PS4 Firmware 10.01 Release Notes:
- This system software update improves system performance.