I'm workshoping in a developer org using knowledge articles and communities. After 99 articles, my 100th article has an error that my article count has been exceeded. I've only got 99, so I don't understand why that is. Is there something I need to check to increase my limits?

How does everyone feel about being a developer in the Salesforce stack? I am about to graduate from University and head to a company where my team will be working exclusively with Salesforce and I am not sure exactly what to make of that fact.