Laptops have traditionally, and still carry on that
tradition, have an extremely high problem rate.
Consumer Reports has indicated that regardless of
brand they saw a 20%+ failure rate new and right out
of the box among laptops. Another consumer reporting
agency indicated that all, 100%, of laptops will
require service in its expected 3 year life. If you
own one, or are anticipating owning one, the extended
warranties are highly recommended.
Aside from the high failure rates laptop manufactures
take great liberties on what's inside the can. The
fact that a laptop is branded Gateway or Dell or
whatever they are not the manufacturer. The real
manufacture is any number of nameless Far East
manufacturers contracted to produce this or that
laptop with this or that feature(s).
Recently Gateway enjoyed a plague of CD/DVD drive
failures. A fellow employee was the victim of
this plague. Although the Gateway laptop had
the same name and model the original manufacturer
decided to change drive supplier mid stream picking
one that proved to exhibit a near 100% failure rate.
Apple Computer is presently experiencing a 20% plus
hard drive failure rate in it's laptop computers.
I was told by one unfortunate owner of one of these
machines that replacement drives are backed up
for months.
1st Rule. Don't buy a laptop and expect to
get a reliable computer.
2nd Rule. If you insist on buying one of these
things purchase the extended warranty.
3rd Rule. Do not count on your laptop to be
your primary computer. It's a portable device
and not to be counted on when needed.
4th Rule. Don't expect a laptop from Brand Name
XYX, Model Number MD-234A, Serial Number 123943
to be the same internally as laptop Brand Name
XYZ, Model Number MD-234A, Serial Number 123944
to be identical internally with its siblings.
So, bottom line, suggestions on this or that
Laptops is likely to be based on experience
with a single machine with little or no knowledge
of the entire deployed base.
While you make some true (although obvious to most of us) points in your post, your statements surrounding reliability stopped being true in the late 90s. I had a laptop that ran Mandrake 9.2 and was not only my main machine, but my only machine for over a year. Not only was it super stable, but everything worked too. This was three years ago now.
My iBook, while not running Linux, has also become more than just my main machine, but the centre of my very existence (iPhoto for my kid, iTunes for my music and livelihood, Neooffice for productivity, etc.). Laptops are not the future, they're the now. More and more people are ditching desktop machines in favour of a portable solution.
And Linux has become only slightly more difficult to configure (and with some distros not at all).