You are missing: - Every interaction needs to be recorded (metrics!) - Every interaction needs bot protection - A/B testing, show some users new stuff - Gather

You are missing: - Every interaction needs to be recorded (metrics!) - Every interaction needs bot protection - A/B testing, show some users new stuff - Gather all that good user data for tracking and selling - Probably at some point they refactored the UI and now they maintain old and new stuff, they still ship everything of course If you in the web app and open the network tab you will ve surprised how much junk they are moving around for a seemingly simple app.