The "new" app is actually not so new, and it was previously called Workflow (https://www.workflow.is/). Looks like they bought it and rebranded it as Shortcuts.
I never used it before, or maybe once on my iPad. But did it have as tight an integration before? I assume Apple added some iOS level things that really put it over the top. The Siri shortcut for sure. Either way I’ve already spent a couple hours with it today just hacking random scripts together. It’s great!