I wouldn't see WebView2 as too much of a victory at this time - although the bootstrapper is tiny, the user will still have to download those 100MBs on first interaction, and use of evergreen version means that your application may eventually break into pieces once the web standards move on or bugs are introduced to Chromium. As result, I've not seen non-fixed version used in any complex (read: WebGL, WebAudio, Shadow DOM, etc.) applications.
In what can be seen as comical lack of improvement over the last time GM performance was compared here (was that in 2011?), the post ceases to mention Construct's objective advantages over GM - use for rapid prototyping and the Remote Preview with live reloading (which is something that as of yet takes a $30 asset to somewhat replicate in GM).
As it goes with these things, there is always some sort of a catch:
Member since 3 Feb, 2014