Dave Plowman wrote:

CRT still used for high end projectors? How have they overcome the
inherent problems?

Such problems being fragility, longevity, bulk, heat and noise, presumably.
I don't think they have: on the domestic scene at least, it's just a case of
some users convincing themselves that the allegedly superior results are
worth the drawbacks. A bit like those hifi diehards who'll tell you that
valves are better than transistors, and LPs superior to CDs...

Bert