Although your article is resassuring to some extent, whilst we continue to wait for the Chromium Edge browser control, things are increasingly going wrong with the existing IE browser control. In the past week I have seen:
1. a thread reporting issues with displaying a PowerBI report in a browser control - see Embed Power BI Reports into Access Forms | Access World Forums (access-programmers.co.uk). Possibly a bug that needs fixing?
2. One of my own apps that opens a Google map for the current geolocation no longer works as the GoogleMaps JavaScript API reports that I'm using an outdated browser. Obviously that isn't something Microsoft can address directly as its a change made by Google
It is extremely likely that other problems will surface in the coming months.
The new browser control isn't just something that would be nice to have. It is a necessity
The current browser control is limping along and has many issues.
For example, the maximum length of a URL is just 2083 characters which is inadequate for many web addresses such as loading maps with data layers