Sadaf Sana Anwar

Hear, hear!
 
 And not just toy programs, not the millionth CRUD app, but one with business logic.
 
 And not just writing, but deploying too.
 
 Business logic requires you to translate complex or data structures, or difficult flows into the idiosyncratic ways of the new language. It shows where the downsides of that language lie.
 
 Deploying shows how well your assumptions hold up in reality. It'll reveal race conditions, performance bottlenecks and bugs. Many, many bugs.