Are other distros not serious? I don't understand what this is.

uses the GNOME interface

yeah thats a no from me.

I don't get it. What's the spirit of ubuntu? Is the underlying OS based on ubuntu instead of fedora?

What's the actual difference to fedora silverblue?

Half the answer to "why did you make your own linux?" is that it's awesome being able to revert back to the original fedora OS.

Because it follows a cloud-native approach, the end user has the flexibility to rebase back to the stock Fedora or any Universal Blue image. It's more like having someone install, configure, and maintain a polished Fedora setup for you.

And the other half doesn't provide any info either

Bluefin utilizes Fedora's OCI features to compose and build an OS image. This process is overseen by a well-structured community that is committed to automation and sustainability. The end result is akin to a configuration management tool like Ansible or Salt, but without the typical challenges associated with maintaining a custom distribution.

Source

I prefer to have a minimal linux ditro and install the apps I need.

"I use bluefin btw" It doesn't feel nice.