Microsoft began testing the Cloud Download feature to restore the system over the air. It appeared in the insider assembly of Windows 10 18950 , but so far it has been disabled.
Windows itself downloads the latest stable build and the necessary drivers , even if the system has completely crashed and does not boot. Similarly, macOS recovery works.
Manufacturers of laptops and computers usually offer users to download Windows 10 and install it on a USB flash drive, and then reinstall the system. But, as a rule, few people have a USB flash drive, and the system crashes at the most inopportune moment.
When the “Cloud Download” will appear in a stable version of Windows 10, is not precisely known. It will probably be added in the first half of 2020, when the spring update of Windows 10 will be released. [ The Verge ]