[skybrian]

I think a better way to say it is that, for ordinary, general purpose websites, it's unlikely that such a complicated architecture would be in any way superior to a regular web page implemented using a more ordinary architecture, and there are downsides.

But that doesn't rule it out in some special case. Special cases are special. (I recently wrote a Chrome-only web app because it requires access to the serial port.)

[thagsimmons]

I don't think this is significantly different from what I said ("if your functionality justifies it..."). That is, evaluate service workers in the same way that you would any other complicated additional requirement or feature.