They might be. I tried running it locally with the latest ruby LTS and ran into errors. It only worked with Ruby 2.7.

However, what isn't clear is if we need to discard the whole project and go to another one or just help the maintainers. I will see if I can help.

Maintenance is certainly useful even if there are no new features. I doubt the project is bug-free so no updates means no bugfixes either.