My current desktop machine that I do development on is more than 9 years old, sub-1 GHz. I've upgraded the OS to XP at some point, and it runs just fine. The only thing I've noticed being slow are some flash movies.

Although for some adult ages the percentage of gamers may be growing, e.g. they stop for a while and then when their kids are old enough to play they get back into gaming, so there may be a bunch of 40-somethings who had video games as kids, and are now getting back into it with their kids.

No, just as you can't expect to take a bath in water at 140F. Coffee may be best brewed at 200 and served at 160. Baths are best around 100-103.

Painful hot is about 110F. Water heaters are not supposed to come set at over 125F from the factory. You'd have 3rd degree burns after 30 seconds at 130F, so 140 is definitely not lukewarm.

I've seen the first happen to someone at the race track, I think the ABS sensor moved far enough away from the axle it didn't see movement, so thought the wheels were locked up and kept the brakes off.

There are a couple bits around Cleveland where the road has a bit of a washboard surface approaching traffic lights that cause the ABS to act funny. I think it's a resonance that as the tires bounce and get light they partially lock, the ABS pulses, and when it reapplies they are on the next bounce and lock again.

How about a joke analogy:

Man in a diner: I'd like a coffee with no cream.
Waitress: Sorry, we don't have cream, you'll have to have it without milk.

You can look at Africa, with a growing population that strips the forest, turning more of the continent to desert, shrinking food production per capita, serious water shortages. You end up with an AIDS epidemic, constant warring, and water and/or food shortages causing some very low life-expectancies.

The population tends to grow to the point of exhausting resources, whether it be land, water or energy. This gets corrected by war, disease or famine.

While the problem is population density, it is in terms of the amount of land needed to provide food, water, fuel etc for a person. While having high-density cities surrounded by low-density farm-land may work best, the quality of life is best when the population density is far below the maximum point, allowing for the inevitable ups and downs in nature. Arizona and New Mexico can't support as large a population density as areas with better climate and terrain. A world wide negative population growth would be a huge positive.