Often ROI is not realized on the short-term but rather the long tail. Users may not bounce immediately... however whether they stick with a product or not over

Often ROI is not realized on the short-term but rather the long tail. Users may not bounce immediately... however whether they stick with a product or not over time, may be a result of how usable it is. Same with if they would recommend it to a colleague or family member over a longer period of time. These things can be harder to quantify and are often omitted in ROI analysis.