They did engineer a good browser: original Edge with the Chakra JavaScript Engine. It was faster than Google Chrome and had some unique features: a world-best, butter-smooth and customizable epub reader. I loved it for reading - it beat commercial epub readers - and then Nadella took over and said Microsoft is getting rid of it and Edge will move to Chromium and Microsoft will also get rid of Windows phone. Modern Microsoft will be Cloud/AI and Ads. That was so depressing.