Roman, this feature might be interesting for GSS, as it's now possible to enable services if needed.
I've reverted the patch, because isolating a unit during boot (which we use to fix this bug) is not a good idea and leads to bad regressions and unpredictable behavior.
The insight which we gained with comment 3 is the reason for closing this bug. Support for i.e. FCoE is not impacted by this.