There's currently no integration of dracut with the way the systemd-boot
prototype support works (https://en.opensuse.org/Systemd-boot).
So calling dracut to generate an initrd would lead to the initrd in the wrong
place aka useless. Instead one would have to call "sdbootutil add-kernel" resp
"sdbootutil add-all-kernels".

The interface is still WIP so I wouldn't want to ask for adding those calls
actually. Instead I'd like to have a way to override the script.
The rpm scriptlets are already in a subpackage so I can provide alternatives.
How about  moving regenerate-initrd-posttrans there too?