One thing Microsoft really must consider for the new Edge to have IE compatibility is embedded support for Java. Ya we know this means supporting Oracle, but that's okay in the open-source world right :) Chrome fails miserably with Java compatibility while Internet Explorer continues to work seamlessly with Java installed. Online Banking Use Case: When people need to make electronic deposits in online banking they have two options: 1) mobile app camera or 2) computer scanner. Millions of people make e-deposits every day and will almost always require Java (not Silverlight or ActiveX) for PC scanning from the browser. You cannot use Chrome for e-deposits with the largest credit union in the world -- No it just doesn't work in Windows. You have to use Internet Explorer with Java to enable: View scan devices, Select the scanner, Control check scans, and Verify scan images. The new Edge needs to be fully compatible with IE to be the best browser with Java support for online banking.
No. If anyone has a web that relies on Java on the browser to function they should upgrade asap or keep using IE for that. There's going to be a IE-mode inside this new Edge, so maybe Java stays alive for a bit longer, but that's just a patch on the bigger issue that is Java (and Flash).