Yeah - that's been pretty much our guidance (I'm on Surma's team) - but we know you can build interactive experiences on the client on these low end devices too, but it has to be off main thread.... In the end, it's a blend .

But they may have a bad network connection as well.

Correct me if I'm wrong, but isn't one of the uses of web workers to do resource management via local storage, so that multiple tabs can share one set of resources?

Not everybody is using web workers for that, but that could address both issues to a degree.