Why can't you turn Tapestry into a web app for other platforms?

Tapestry is designed to be private and secure. One of the ways it does this is by isolating each feed into its own JavaScript context. Each context may contain information you consider personal, such as an email address, your preferences, etc. Additionally, each feed has its own set of login credentials that are stored securely and only used with a single context.

A web page or web app has only one JavaScript context to work with - you can only get another one by opening another tab/page.

This means that all feeds would need to share information in a common context, and have access to each other's credentials and other sensitive information. There would be no data isolation, and we can't build something that would be open to abuse.