Hi Ayub, wow thank you! That is quite the compliment. I don’t think PostgreSQL is a replacement for Snowflake. If you are using it for analytics purposes, it could slow your database down to be queried that often. I recommend setting that up and then ingesting that data into Snowflake.
And no, I keep it as is. You could delete it but there is a chance that you may want to go back and create changes to the data model, so I don’t see a point in deleting it. But, if you wanted to save on storage costs you could. But storage in Snowflake is usually a very low cost compared to compute.