Having tried a variety of tools, I usually return to Snowflake. Within Snowflake, I don't use notebooks; instead, I prefer to create database Views to contain my code. I may have Views that call other Views etc. I like Snowflake because for every query in its UI, it automatically profiles the results it returns. e.g., for each column it gives a frequency distribution histogram of the values within the column. In short, I like the ability to store my code in something I can easily backup and re-use without adding a lot of other tools.