Just for the record, I personally have installed over 20- 8350s and 8- 8700s, and gosh, golly....none of them have had any single issue so often related on either Epson 8000 threads.
No Dust. No visible color banding or shadowing on sides or edges, and no noticeable Convergence issues.
At least 4- 8350s have in excess of 4000 hrs on the original lamp...one has almost 6K. To date, not a single 8700 has had a premature lamp Failure ( - 2000 hrs )
1 8350 did have an electrical failure after a surge from a lightning strike, that blew out both HDMI inputs, but it was exchanged for a Refurb that also has performed with distinction.
8350 Lamps that have failed at 1800 to 2300 hrs and were replaced @ N/C
Most all of the 8350 units installed are used daily....lot's of TV viewing. The 8700s are to a one all installed in "Theaters"
I did just replace one of those (8700) for a 5020, but it's still cherry looking in every respect, still has it's original Lamp in place, and still has it's freebee lamp in the Box. Gonna list it up on AVS Classifieds soon.

As
Musicalfox stated, the Threads on AVS contain activist individuals who are both adept at searching for a venue to find solutions to issues, and VERY adept at expressing their dismay if such relief is not had.....yesterday. They are by far the most outspoken, and usually the most antagonistic as far as the content and expressed feelings contained within their posts.
*** Such is the nature of such Forum venues, and while they most certainly do NOT represent the mainstream of consumer experience, they can indeed influence a Mfg attitudes and effective actions. I've seen it happen, as have many others. One cannot discount the effect even a limited number of complaints coming from such "activist" quarters have on the sensibilities of a Mfg who actually cares, and it's quite apparent that Epson USA does care..
What is lamentable is how all too often, a few individuals take personal affront, and become determined to ward off any / all others from even considering the same purchase they themselves made. Usually it's really all just a case of frustration
*** (...some have had to get 3...even 5 units replaced...) and in such cases some "Mfg directed" ire is absolutely deserved. But in the end, even after having finally gotten resolution, even a upgrade, such response that would
NOT be expected from any other PJ Mfg, still they continue to rant against the Mfg / product.
Redundant expression of a personally developed attitude is also a Internet standard. Subjectivity and objectivity flies out the window if anonymity can be / is used as a shield. But what I see happen the most on the Epson Threads is just a case of continual Venting to express ire by a relative few.