This section of the design spec says: "Note that driver.conf files are shipped read-only by design, so that they are over-written on install [...] which precludes handling of the case of carrying forward manual edits to the driver.conf files across an upgrade/install."
Not true. Driver packager is free to make them editable. Many examples of class action scripts for driver.conf files in usr/src/pkgdefs/common_files. -Artem
