Hi @karuppusamy ,

In documentation of declarative pipelines they're saying that 2 default formats recommended are .sql and .py files.

When you read about available formats for databricks notebooks you will see that you have two options:

1. Source

2. IPYNB

If we consider first option, it's supports.py file.

In other words, you can still use notebooks if you want. They should work because you can save them as .py file. IPYNB format should also work. But if for some reason they will stop support it you can always easily convert it to source format.