The latest fast ring insider builds now are offering the new version of Edge with the Chromium rendering core.
Google has used this rendering core and they have made it available for others to use. The intellectual property thief Brave uses this as well. Brave strips ads before presenting content using their own ads instead.
Microsoft has a lot of baggage due to many projects built for Internet Explorer. Some of these projects will need to be modernized to be able to run with newer HTML 5 platforms. The problems of proprietary solutions now demonstrated with the long term results.
Edge has been built to be more standards complaint which still attempting to be backwards compatible. Chromium is probably the best engine as it has been developed by a large team for a long time.
Chromium is part of the Google developed operating system they use for their search engine and data center components.