What’s about sharing documents which is still it’s primary purpose. And most of the current complexity stems from the sprawling JS API surface. We know how to sandbox software (VM and malware analysis,…), browser’s complexity is mostly corporate driven.
I had forgotten the original purpose of web browsers was to view hyperlinked documents. It seems like we abandoned that as the primary use case over 20 years ago, with technology such as Flash, Silverlight, and Java Weblets.
I don’t think that has been its primary purpose for a long time. If you want to share a document for the most part you email it. It has long since moved from documents to applications.
