There's a strong argument that the real reason for Japan's surrender was the Soviet invasion of Manchuria, which happened at the same time. You'll note that the Allies did a lot of damage to Japanese cities with conventional weapons without forcing surrender. The firebombing of Tokyo caused similar damage to the bombs. The bombs however were a convenient excuse to avoid losing face, because unlike the Manchuria campaign they couldn't be blamed on Japanese military incompetance.

Hard real time support, and greater electrical robustness. There's no OS or caches changing your timings unexpectedly, and interrupt latencies are very low and consistent. It also sources/sinks a lot more current, so you can do things like driving an LED directly from an IO pin without an external transistor.

Are you using the Arduino library? It's much faster if you access the AVR registers directly.

Slow it down for a bassline and that 192KHz will actually be useful.

Flicker become invisible at about 100Hz, but only when your eyes are perfectly still. As soon as you move your eyes the flicker becomes visible. Saccadic masking does not supress this. I have personally tested this using an LED and a 555 timer, and I can see flicker up to about 10KHz if I move my eyes fast enough. PWM lighting is extremely annoying to me, as well as multiplexed LED displays.

The most legible font is the font you're most familiar with. I used to take fonts very seriously, tweaking Fontconfig settings, etc. I now use default sans-serif for everything. I literally don't know what font it is, and it's just as legible as my customized setup. Despite all the jokes about Comic Sans I doubt it would take more than a week to get used to it.

Stopped breathing doesn't kill instantly. It's not practical with 100s of people, but with only one there should be time to restrain that person and inject them with naloxone.

You can do meaningful mathematics research with nothing but pencil and paper. Filtering out frivolous submissions is a worthwhile goal, but the fee should be adjusted according to the author's ability to pay.

Try using no toothpaste at all:
http://www.ijdr.in/article.asp?issn=0970-9290;year=2010;volume=21;issue=2;spage=213;epage=217;aulast=Jayakumar
I stopped using toothpaste about a year ago, to no perceptible effect. Brushing+flossing alone is sufficient to keep your teeth healthy.

Lots of tests have been done, here's a good one:
http://www.pnas.org/content/109/3/760

See also:
http://en.wikipedia.org/wiki/Stradivarius#Comparisons_in_sound_quality

You make a Stradivarius the same way you make any other high quality violin, as shown by skilled musicians failing to distinguish them from modern replicas in blind tests.

Running under DOS typically does not give you 100% control over the CPU:

http://en.wikipedia.org/wiki/System_Management_Mode

Maintaining contrast with the adverts was the only reason networks didn't remove all the dynamic range from the programming. Now that the contrast is illegal, there's nothing stopping channel vs. channel competition for loudness. Just as election campaigns target the swing voters, TV producers care about the channel flippers, and being louder than the competition is an easy way to grab their attention.

This law has the perverse consequence of making *everything* sound as bad as the adverts.

Running an operating system is both an advantage and a disadvantage. Hard realtime is much easier on an Arduino.