I have run out of witty titles, so this time around you get the simple version. I'll find out something better for the next time. Today Sony Interactive Entertainment made PS4 system software update 4.73 available on the PlayStation Network.

The update weighs the usual 340.6 megabytes, and like all decimal updates, it does what you probably expect:

"The system software update improves the quality of the system performance"

This is the standard catch-all definition for minor updates, which has replaced the "stability" version a few months ago. Someone at Sony was probably tired of the memes.

As usual, when Sony talks about "quality of performance," they mean of the system software itself, so don't expect better frame rate in games or similar improvements.-

At the moment of this writing the update isn’t available yet on the relevant websites, and and you’ll need to take advantage of the option in the settings of your PS4 or PS4 Pro to launch the download and installation. Later today you should be able to  download it from here if you’re in North America and from here if you’re in Europe.

The latest large update to the PS4 system software was released back in March, and was numbered 4.50. It included external HDD support, Boost Mode for PS4 Pro, custom wallpapers, and much more.

Sony Interactive Entertainment has recently requested users to register to the testing of the new big system software version, about which we still don't know the details.