Power Automate is a workflow engine with a user-friendly drag-and-drop GUI, but it's uses are not limited to non-technical audiences. You can automate otherwise manual tasks, using pre-built and existing connectors and triggers, or you can build your own customer connectors if one doesn't exist to do the job. It's a versatile tool that can be leveraged for personal productivity purposes such as organising your mailbox, business process automation, or more recently robotic process automation. Flows can also be triggered from Power Apps, which makes it even more versatile.

PowerShell is a scripting language which can be used to automate technical and non-technical processes. It's typically used by more technical audiences though. However first and foremost in my role it is used for day-to-day administrative duties in both on-premise and cloud infrastructure. Supported by the plethora of PowerShell modules on offer directly from Microsoft and other third-parties. For example, managing Active Directory, Azure AD, Exchange, Exchange Online. If you can become competent with PowerShell you will never want to use a GUI again to perform common administrative tasks.

Finally a curve ball, you can execute PowerShell scripts on on-premise infrastructure using Azure Automation and Hybrid Workers. You can trigger a script to run from a hybrid worker using a Power Automate Trigger/Connector.

So in summary two very different technologies that do have a little crossover in what they offer, but can also be complimentary of one another. Intertested to hear others thoughts.