Jaroslav, there is a lot more information on the actual wiki page.
Like the fact that this is only for particular opt-in new installs and
that yum/dnf/RPM can only operate in read-only mode on such installs.
Could you resend this with the entirety of the text? It might lead to
fewer questions.
This is being sent to devel-announce, so should not overwhelm people who are not
interested. That’s why it includes the basic description (to let you decide whether you
are interested) and the Scope section (to let you check whether this will, through the
“Other developers” bullet point, place demands on you). It is somewhat important that
everybody reads these parts; wouldn’t including the full page drown these parts out?
Mirek