A decade ago we began organising the Lambda Days conference. Over the years of hosting a conference I have learned that it is all about the people: attendees, speakers and the crew running the event. In the keynote opening the 10th anniversary edition I review what contributes to a positive conference experience. I also discuss what were the most watched talks and what we think made them so popular.

I also summarise what I have learned about functional programming, what were the most influential talks and what made me step down from chairing the programme committee to focus on teaching.

I share my recent experiences of teaching in a primary school and argue why Functional Programming matters to kids.