The bad DMDs with stuck mirrors are of a certain generation of chipsets. While there may be some 2007 or later DMDs with stuck mirror this seems to be a 2006 and earlier model year issue.
People made huge dollar investments in those sets.. sometimes $4k or more. Manufacturer's don't want to pay any out of warranty dollars to repair these sets so that will generate a log of anger, and a lot of typing. Many of the folks who bought these sets have CRTs that ran 20 years without any service so their frustration is understandable.
I don't see how this situation is relevant to modern DLP sets, other than ill will that floats around as a result of these failures. I bought a 4 year extended warranty on my 82" DLP for about $250. I considered it part of my initial cost and it is amortized over the coarse of the TVs service life.
BTW, I own 2 2006 DLPs.. One I parked in the Mother-in Laws living room (56 Sammy_. It only gets part time use, works perfect. The second an HP 65" DLP is in my spare bedroom and gets occasional usage. I have a 2008 Samsung Lamp based 72" on permanent loan to my brother and it has never had any service and is used everyday. It is the center of a very nice home theater.
My main display is a 2009 82" Mits DLP with some 4000 hours on it, I put a $99 lamp in it.
I will likely buy a 92" and I will buy an extended warranty based on the initial cost of the device.. The only set of the bunch that was rough from a reliability perspective was the HP. HP only made DLPs for about a year. They were innovative but between poor thermal management and the not so robust DMDs of the day, it got a lot of work under warranty. It works fine now and has not had any service since early 2007. I have a lamp on the shelf which cost a small fortune back in the day. I would guess that most people who paid HP $5k for that set and had one hell of time would not ever consider DLP again. That experience is not representative of today's rear projectors but it takes forever to get a bad taste out of some people's mouth.
I have seen the big Sharps.. they are only average and they are only 70 inches. Yeah I know the Elites are coming but the pricing sounds crazy and for me 82" is still too small. I have a 14' viewing distance.
With initial costs being much lower than they were in the past on per inch of display basis and reliability being way up, DLP still represents a unique value propposition. If you don't need a screen bigger than 70", then look at LED or Plasma, if you need bigger, DLP is still really the only game in town. Despite all these legitimate gripes about pre 2007 DMDs and the sets based around them.
Mits WD-92840 92" DLP - Lumagen Radiance XS, Martin Logan Motion 40s, Ascend Sierra 2s
Older 58" Panny Plasma -DVDO DUO, JBL Studio 530
Pioneer AJs, PSB Images, Usher S520, JBL HLS-610, Definitive SM45, MusicHall Marimba