Leaving out these bits reduces the price to $499, or $599 for a more powerful model.
And the status glow on a BlackBerry or an iPod lasts only until a newer, more powerful model comes out.
Monica Baretta, an Aprilia spokeswoman, said the higher price of more powerful models "translates into a more restrained drop in overall revenue".
A similar thing happens with cars when a faster, more powerful model is released, making an older (though still shiny) car seem a little less new and seem a little less quick off the mark.
Lately, Europeans have developed a taste for heavier and more powerful models, but European automobiles over all get better mileage than American cars -- averaging about 27 miles per gallon compared with about 24 -- according to estimates by the International Energy Agency.
Sales of the Prius hybrid electric car, which had its debut in the United States in 2000, bumped along for their first few years until Toyota introduced a more powerful model in 2003.
The two more powerful models get an Active Exhaust system that uses electronically controlled bypass valves in order to enhance engine sounds; Active Exhaust is also available as an option on the entry-level model.
Both Unix and C were, from the beginning, meant to move beyond the PDP-7; indeed, soon after its invention, Dr Ritchie and Dr Thompson "ported" it to the PDP-11, a more powerful model.
Cons: No built-in Ethernet, pricey when you get into more powerful models.
Overall, it is expected that more powerful models can be obtained once improved aBCI features are developed.
