Hey Rahul! Glad you enjoyed the article.
I agree, Streamlit isn't entirely a substitute for Flask (yet), and is best for prototyping needs. And they keep adding features so I hope it would be there soon.
And were you expecting more on the deployment side of things with AWS/GCP/Azure? If so, I wrote a follow-up for this last week on how I'll deploy this app using Streamlit Sharing in hours.
And more importantly thanks for the feedback, I appreciate it.