What does “built for Windows 10” even mean? It’s just a browser. It’s even cross platform.
Almost everything that runs on Windows was built for Windows. So it’s a true statement, but pointless. That’s like BF Goodrich advertising their tires as “built for cars”.
You’re right, clicked it away so many times over the years and never stopped to think what a silly statement that was. I feel like it was for a time when 10 was a new shiny ‘mysterious’ thing, that it might convince people into thinking it needed something special, but has just aged like milk.
Their other apps use it or part of it in the background.
Kind of like old Windows apps always used Explorer when they needed a browser
I wouldn’t be surprised if the start menu was using Edge for their search/ads