I don't necessarily agree that adding features decreases agility. Sometimes it can massively increase agility - especially if your product is built in a way tha

I don't necessarily agree that adding features decreases agility. Sometimes it can massively increase agility - especially if your product is built in a way that a new feature can immediately gel with other features. But apart form that, absolutely. Technical debt in the article isn't the technical debt that was originally coined. I still think the common meaning of technical debt is just as important though. Code that can't be taken forward, for whatever reason, costs its owner.