First special feature: The rpm is still there and the release is only done for Linux and Oracle Solaris.
To get to the Linux download page just click here.
But the Grid Infrastructure is still not delivered as RPM package. :-(
Root Scripts Automation Support for Oracle Database Installation
Starting with Oracle Database 19c, the database installer, or setup wizard, provides options to set up permissions to run the root configuration scripts automatically, as required, during a database installation. You continue to have the option to run the root configuration scripts manually.
Setting up permissions for root configuration scripts to run without user intervention can simplify database installation and help avoid inadvertent permission errors.