It influences playability, which is functionality. Fender's marketing advertised the shape as a functional feature: body carve for easier playing standing up, double cut for easier access to higher frets
> No one uses their indicators/turn signals as they approach. This is a major issue because it makes the roundabout incredibly ineffective, as every driver needs to treat it effectively like a 4-way stop because you don't know the intentions of the cars around you.
As another commenter mentioned, roundabouts work just fine even if nobody indicates anything (which they usually don't where I live).
Gas phase change systems in practice are up to about 60% efficiency (relative to an idealized carnot cycle), magnetocaloric systems in labs have been something like 70%, and elastocaloric 80%.
Edit: And just for reference peltier devices are usually 10-15% efficiency on this scale. So I suppose this new one is somewhere in the 20-30% range.
Some people will sleep through alarms, turning them off without remembering it.
But more importantly, if your sleep schedule is shifted you might not actually be able to fall asleep when you need to, even if you haven't had enough sleep. After a few days you will be exhausted, fall asleep in the afternoon and take a nice 4 hour nap, leaving you unable to fall asleep until very late, after which the cycle continues.
That would be the whole shape.
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