You are proud of bringing out the new Outlook for Mac as a native app. And then you go on to push this PWA wrapper crap on Windows. Why does your own platform get a subpar Outlook when a competing platform gets a nice, native client written using the native platform toolkit? A web wrapper is never a good solution. And certainly not for an e-mail app. Use the native platform toolkit (WinUI3 + WinAppSDK) on Windows to create a truly modern, flagship e-mail client for Windows showcasing the very best of the platform. And if the native platform is missing features, then good news! You are Microsoft, you can improve the platform!
About the only good thing about the new Outlook is that it finally can render HTML correctly. Otherwise, it is a downgrade in every way possible. The UI is ugly and poorly integrated with Windows. It can't even save attachments, you have to download them. Forget dragging them to an Explorer window. Performance is, naturally, horrible. It is a webapp after all.
Not to mention breaking compatibility with years upon years of third-party solutions integrating with Outlook. As others have written, the web-based addons are horrible and nowhere near as performant or feature-rich as VSTO/native addons are. This leads to a sub-par experience for our customers. And there has been zero movement on addressing basic issues like drag and drop support.