The Windows 11 Microsoft app store is certainly a new start for the company, with Microsoft letting go of its paternalistic attitude and letting Windows 11 users and developers access the full capabilities of win32 applications via the Store.
This has meant we have seen new kinds of listings, such as for browsers such as Firefox and Opera, and it appears also apps which Microsoft has a long history of animosity towards.
Softpedia reports that CCleaner, the famous Windows optimization app, is now available in the Microsoft Store.
In 2020 Microsoft officially marked CCleaner as a Potentially Unwanted Application on their Microsoft Security site:
That decision was reportedly due to the installer installing some additional unnecessary applications.
CCleaner has in the past been compromised to deliver malware to Windows PCs, and there have also been some issues with CCleaner not being compatible with Windows 10, though those issues have now been fixed.
In general most of the things you can do in CCleaner you can do with built-in tools, but it is good to see Microsoft letting go of some control and allowing users to make their own decisions.