Thanks for your question, @maxine_buchert :) Well probably all the things it doesn't currently have (which you can see here: https://github.com/i5ik/Viewfind...) ... but I guess a more gentle and honest answer would be: - Security and privacy: the RBI security model has many pros - Cobrowsing and collaboration: watch and interact with the page in sync with others - Bandwidth arbitrage: Hop over slow networks with a faster node. - Research and vulnerability testing: f you work for a public institution or non-profit you may be able to use Viewfinder Regular in your work for free.