I don’t use edge at all. I think it is telling the MS hid IE from the user and presents obstacles to making it - or any other browser the default.
I’ve been modestly successful in mitigating the migration experience for people by restoring IE (or better yet giving them a 3rd party browser like FF or Pale Moon) for their browsing and email needs.
Anything edge can do the others do better.
Not that I use Cortana, or even Edge, but last I knew, Cortana needs Edge.
Just sayin'.
(I go between FF and Brave)