It's surprising to me that Gmail doesn't take more advantage of code splitting and lazy bundle loading -- I wonder if it's common practice among "modern" JS apps (i.e. the Angular-using ones like Cloud Console), but difficult to do with GWT.
This article barely mentions GWT. Is Gmail still officially a GWT app? Wappalyzer seems to think so, if not GWT by name, it identifies the programming language as Java.
What was the goal of the redesign? Did anything positive come from it?