From the looks of it, alien is just a tool to convert between different package formats and is not a replacement for proper packaging work. Very much like how you can’t take a deb package from different releases of the same distro and expect things to work properly, you can’t just take RPMs from CentOS to a whole different distro and expect things to work.
It’s not only the differences in the packaging format that you have to take care of. There’s also version differences, path differences, dependency handling, and many other stuff to take care of. These are the kind of tasks which can’t be automated away and require non-trivial amount of work.
For organizations that maintain tens, hundreds, or thousands of CentOS packages that spans multiple teams, moving to other distros would be time-consuming and costly. It would certainly pay off if it was driven by technical reasons, but for organizations that are forced to switch by this announcement, this is just pure overhead.
It’s not only the differences in the packaging format that you have to take care of. There’s also version differences, path differences, dependency handling, and many other stuff to take care of. These are the kind of tasks which can’t be automated away and require non-trivial amount of work.
For organizations that maintain tens, hundreds, or thousands of CentOS packages that spans multiple teams, moving to other distros would be time-consuming and costly. It would certainly pay off if it was driven by technical reasons, but for organizations that are forced to switch by this announcement, this is just pure overhead.