[marbletiles]

You're being downvoted because based on a single, arguably marginal, use case ("I only ever want to know the exact temperature right this very second and everything else is useless to me") you're a claiming that there's no need for anybody to consider the much more important and larger use case of "I need my phone not to instantly become a dumb brick when it loses reception"

I saw elsewhere that you think mobile apps are already doing the right thing here. The reaction to you - and the point of the OP - is that they're not. Proper offline support is often a poor second in application design, if it's considered at all. We should change that.