[tchiotludo]

Temporal.io is a really cool framework for building business process like managing microservice workflow (like paiement workflow: user pay, we call the shipping microservice, the billing microservice, ...) and good fit to handle individual event (lots of individual events).

Kestra (and so airflow) is more a workflow manager to handle data pipeline like moving large dataset (batch) between different source and destination, do some transformation inside database (ELT) or with Kestra you are also able to transform the data (ETL) before save it to external systems.

This lead Kestra (and so airflow) to have a lot of connectors to differents systems (like SQL, NOSQL, Columns database, Cloud Storage, ...) that is ready to use out of the box.

temporal.io, since it's first design to handle microservice (proprietary & internal service) don't have this connector out of the box, and you will need code all this interaction.

So my opinion:

Building data pipeline interacting with many standard systems will be done easily & quickly with Kestra (or airflow)

Handling internal business process of micro service will done easily with temporal.io