Suggest you do a little research. When it comes to longevity, the shortest lifespan is LCoS. In addition is is based on Liquid Crystal technology (hence its name). It is a cumbersome design that produces far more heat than either LCD or DLP, which is why Sony, JVC, etc. dropped it from their product lines. For picture quality, DLP beats them both. The only part on a DLP based projector that needs to be replaced is the lamp. The mirrors do not break down, as the amount of change between their "on" and "off" position is very tiny indeed. The failure rate of a DMD chip is lower than any other other technologies, including CRT. A little education goes a long way. Sony and JVC teamed up a few years ago when DLP was making gains in market share over LCD and Plasma models. DLP (Digital Light Processing) is a technology licensed by Texas Instruments. Sony and JVC did not want to pay royalties to a third party, so they had their engineers attempt to design a rear projection technology that could compete with DLP in both quality and price. They got the quality part of it, but could never get it to where it could be manufactured economically. In addition, each photon of light must pass through its LCD panel not once, but twice, due to the design of the LCoS light system . This resulted in overall lower contrast when compared directly with DLP. Some studies indicated that LCoS was able to achieve better black levels, but this did not translate into better overall contrast. Sony called their proprietary LCoS system "SXRD", and JVC called their "D-ILA". Both were plagued by technical problems throughout their brief history, most notoriously the "green blob" effect, as the tiny LCD panes in the LCoS aged at alarming rates due to the heat and the effect of dye degradation from the intense light source needed to drive it. In the end, it was scrapped by both JVC and Sony. Their engineers believed there was no practical solution to reversing the issues being seen with the technology. It is why digital theaters around the world went with DLP technology, and not LCoS. Today there are thousands of theaters around the world using the purely digital DLP system.
If you find my post useful or informative, please click the icon below with the plus sign and star to give kudos. Thank you!