Adoption
Cognitive Load
The mental effort required to use a product, which competes with the job the user is trying to get done.
Cognitive load is the mental effort a product demands: learning new terms, remembering workflows, making decisions, interpreting interfaces. High cognitive load means the product is competing with the user's actual job for mental resources. Low cognitive load means the product gets out of the way. The Invisible Product has near-zero cognitive load. The Frankenapp has near-infinite cognitive load. Every element that doesn't directly enable progress increases cognitive load and reduces stickiness.