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Nothing to be sorry about. If we did not dream of better things, we would still be living in caves. It was vapourware when I first saw it. It has not even been available even at US $4K +++ . So it looks like it will be available soon.
I would imagine thermal stability would be its biggest drawback. The fact it weighs 22Kg means that there are serious distance tolerances between all the optical components. This is only supposition on my part.
Remember the first law of the Universe. There is no free lunch. Or in other words you can tweak a system to get one parameter better and the rest get worse.
Bert
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