Results of one block are piped to another, and operations range from very high level to very low level, so you can easily make stuff like "take input file, run OCR, and submit the text to this URL". There's integrations with HomeKit (smart home), many system services, third-party apps can also add actions. You can add actions as dock icons, context menus, share sheets, etc. It's also synced between all your devices, you can tell your HomePod: "Hey Siri, shutdown the homelab", and your lackrack goes quiet.

It's extremely cumbersome if you'd try to use it as a general-purpose programming language (I've tried implementing UUID4 just as a benchmark and gave up pretty fast), but very intuitive for simple tasks like that.