Lighter than Air? Apple shocked the whole industry with the first MacBook Air: We had never seen such a thin and light notebook before. However, the other manufacturers are just as good by now when they build a thin device and there are several Windows alternatives to the current MacBooks.
http://www.notebookcheck.net/Notebookcheck-s-Top-Windows-Alternatives-to-the-MacBook-12-Air-11-and-Air-13.150519.0.html
What about HP's new Spectre 360 Kaby Lake?!
XPS 13 with 7.9GB?
With such poor cooling systems, the manufacturers should limit lightweight notebooks to i5 CPU's, because the i7 will perform worse with thermal throttling. It's silly that some of them only offer i5 CPU's to only 4 or 8 GB of soldered RAM, and then require you to upgrade to i7 if you want more (or if you want dGPU), which actually defeats the intended purpose of trying to get more RAM by giving you a worse performing CPU.
An alternative to MBA would be machine without a fan, so a silent laptop.