Windows Store applications used for web browsing need to use the HTML or JavaScript engine provided by Windows 10, but Chrome uses their own Blink engine. If you want to follow the rules, Google will have to create a special version of Chrome.
Most Windows 10 machines don't run Windows 10 S, so Google probably won't create a special version just to bring Chrome to the Windows Store. Google also can't point to the current desktop application package into the Centennial Windows Store. Microsoft has stated that any application on the Store must use Edge's rendering engine.
Perhaps Google just did that to deal with fake Chrome apps on the Windows Store, a problem that MIcrosoft had to try to solve for years. Now that Chrome has been deleted, anyone who wants to use Chrome will have to use Edge to download.
This is not the first time Microsoft and Google have a dispute with each other about browser issues, platform. Both have dispute about YouTube application issues on Windows Phone. Microsoft lashed out at Google with Scroogled ads, and Microsoft also criticized Chrome for battery power. Google has not commented on being removed from the Store.
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