The new version is Chromium-based and is set to migrate via an Over-The-Air software in the background. It can be done through the regular Windows update on Windows 10 PCs/laptops according to a support doc.
The Chromium-based Edge is for all Windows 10 users as it doesn’t give the user a choice to keep the older version of Edge. It applies to all Windows platforms later than April 2018(Windows 10 version 1803).
The customers are made compulsory to migrate to the new Edge to be more secure and up-to-date. For Organisations Microsoft launched a Blocker toolkit which enables the administrator to keep a track of the new update.
Microsoft is adding more extensions to the store and asked all the users to enable their extensions on the new browser. The older Edge version has a limited number of extensions that can be enabled on the browser due to the manual reviewing policy of each extension.
Chromium-based Edge now has more than 100 extensions in the store and Microsoft is planning to add more add-ons to the store.