This definitely makes sense from a business standpoint. MS gets two big things from Edge/IE: one, people using Bing by default, and two, tight integration with

This definitely makes sense from a business standpoint. MS gets two big things from Edge/IE: one, people using Bing by default, and two, tight integration with Windows/Office/MS Cloud services. All of that has nothing to do with engines, very little to do with even UI design.