It's default software on Windows 10/Windows 11 22H2. I started using it once they made it available on Github a couple years back and it's pretty neat. You can upgrade your apps with just winget upgrade --all, search if an app is available on their pseudo-repository with winget search <app name>. You can also export/import a list of your installed applications if you say, want to make an easy migration from system to another.
Only difference though is that the installers for software not on the MS Store are pulled from their respective sites. So there may still be a small risk if the site hosting the installer has been compromised.