> Websites will become even more opaque and complex. Definitely not looking forward to it.

Why is that an issue? Do websites need to be open source? How many people, including software developers, will actually view the source for a 3rd party website and/or try to debug it? Beyond screen-scraping and learning purposes I don't see a use case for it.

I'd be quite happy with my browser(s) downloading and executing binary blobs if it means better usage of my devices' resources and bandwidth.