I wanted to ask a question in [Only registered and activated users can see links. ], but today it was closed.
Therefore, I will ask my questions here.

Thus, the Updater works correctly with all modern devices that can switch to pre-boot mode. Correctly ?

It's not entirely clear why WebUpdater is not used for these purposes?
It is more modern, it can work not only with the RGN, but also with the GCD.