Either I am missing something hidden in plain sight or or maybe deep design knowledge is required to understand why Microsoft killed (is going to kill) an excel

Either I am missing something hidden in plain sight or or maybe deep design knowledge is required to understand why Microsoft killed (is going to kill) an excellent Todo app and to replace it wrote another app, clearly inferior, from scratch which turned out to be "okay" at best. I mean they could rebranded the app if they did have to call it Microsoft To-Do; and maybe changed the colours and all.