If you miss the games from the arcades of the 80s, or the classic Mac, Apple II or other systems, you can still play a lot of them on your Mac today. They are free and you don't even need to install anything.
(I posted this earlier this week, but it disappeared! Weird. I was wondering why no one commented.) WebP is a new image format. Well, it has been around for a few years now, but with Big Sur it now has macOS support in Safari and throughout the system. At least for viewing. As for creating them, there is at least one Mac app that will do it.
So I was playing with Automator and trying to use the built-in variables. Turns out you can use them for all sorts of things, like a Quick Action that inserts the date in text. By using a compound "Text" variable, you can build interesting strings of text to insert without using any other Automator actions or scripting.
Learn how to use the Finder's four views: Icon, List, Column and Gallery. Each view has its advantages in different situtations.
If you don't like the colors or brightness of the macOS Big Sur default desktop wallpaper, you can create your own. It is easy to take the default image and tint it to your own color or even add more to the design.