UX Roundup: AI Diffusion Speed | Progress Bars | Synthetic Personas | AI Learning | Brad Myers | Agatha Christie | Mental Accounting | Grok Imagine 2

AI technical capabilities are exploding, but sophisticated use crawls | Progress bars make waits bearable | Synthetic personas exaggerate demographics | AI hurts education when used wrong | Professor Brad Myers is a UX hero | In the future, we’ll all be Agatha Christie | Mental accounting gives users separate budgets for separate expenses | Grok releases upgraded image model