GoodJob author here. The reason is that I don't have any production experience with Sidekiq.

My target right now is someone, like myself, who would typically spin up a new project with delayed_job or que, and provide a better alternative with GoodJob.

Maybe in the future I'll do some more research on understanding why someone might switch from a Sidekiq/Redis to not-Redis.

I think they specifically wanted to compare themselves to queue systems that use the database as the storage for queued jobs.