No, I'm saying that web apps are slow because there is no thought put into the architecture of the application, and the structure of the app likely matches the structure of the team, not the design of someone who considered holisticly how it would work.

>laggy even when showing animations Yes, often because those web apps use a javascript like popmotion instead of just plain css transitions.

Or some dev writes an onScroll or onHover function with zero debouncing.