Hi @kali ,
It's not that Storybook is no longer supported, we will still continue to generate Stories for your Slices and you can still continue to use Storybook. It's just that we will no longer work on automatic set up integrations and it will be up to users to configure Storybook in their projects.
That being said, if you want to stop using Storybook and use the Slice Simulator instead, you can remove remove the Storybook folder and dependencies.
Thanks.