That makes the usability and performance of the windows start menu even more embarrassing.

The decline of Windows as a user facing product is amazing, especially as they are really good at developing things they care about. The “back of house” guts of Windows has improved alot, for example. They should just have a cartoon Bill Gates pop up like clippy and flip you the bird at this point.

The Start menu is React Native, but Outlook is now an Electron app.

React Native, not Electron. Though it is slower than it was

People believing it says something about the start menu