Where I work, edge is the new IE, and there has never been an interregnum. I think people forget that institutions have their own logic.
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Sure, these are "just Chrome" components and libraries .. but they're engaged in more than simple web page rendering.
NB: I'm not engaging in Edge is Evil conspiracy here and there are "reasons" for what's going on there that some may or may not accept. Just pointing out the additional below the surface integration.