What are some "no brainer" inventions or features that just haven't made it to the consumer yet?

TehBamski@lemmy.world to Ask Lemmy@lemmy.world – 191 points –
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It's not exactly universal. In Germany, this can be interpreted as you warning of a pending emergency and trigger slowdown; they'd do thanks by signalling left-right-left-right rapidly.

Oh, yeah, we use that too. It's absolutely contextual, on the highway we use it for what you described.