Are they really sure this feature is "exciting"? It's a welcome change for sure, but I can't quite see them beaming with joy or writhing orgasmically, simply due to an implementation of HSTS. An odd fetish, indeed.
Apparently it's becoming a thing to cheer for Microsoft when it implements a feature in its browser that others have had for years. It's like cheering for the 10th guy who crossed the finishing line instead of the first.
Firefox has had HSTS support since version 4 and Chrome has had it since 4.0.211.0. Indeed, it is great to see Microsoft do this, but too little too late?