I think @arw.me has an electric coffee mug (Ember?) keeping his beverage at a reasonable temperature for some extended period. Perhaps he could pass on a recommendation?

Have you considered writing more about potatoes?

On the other hand, knocking down fences is fun, while understanding why fences are there is usually not fun. :(

You're entirely right. The promises signatures can make are different in kind, but hopefully no less useful. wicg.github.io/signature-ba... and wicg.github.io/signature-ba... get at the distinctions to some extent, and I'd welcome additions to those descriptions.

It's unfortunate that this is _also_ the way to discover whether food is untasty.

wicg.github.io/signature-ba... seems likely to depend on this mechanism; it's going to be necessary to spell out unambiguous approaches to those decision points that make it clear how to generate and validate signatures in a consistent way on both the server and the client.