If you have a Mac that cost a couple of thousand $ and some gear that cost a couple of thousand, this is a cost-effective solution.
If you think it's too expensive, then you don't really need it. I have no need for this but I also don't really need it.
I don't know if I can agree with the message implied here that just because you spent a couple thousand on your Mac, you must therefore have several thousand more to spend on peripherals and must be willing to spend and pay whatever amount it takes for something which may give you more utility or convenience without concern for cost. Even somebody with thousands more to spend after spending "a couple of thousand" for the Mac would want to draw the line somewhere on what is and is not worth the money vs. worth the convenience (cost/benefit factor). At least, the cost involved here would have to make them think twice about it.
The corollary here seems to be if you want or need "it", you should not be concerned about the price, just perceived satisfaction. So, don't moan or complain about cost, pay whatever it takes, or just step aside for those that will pay it without concern. That is what people used to say about the Rolls-Royce, and look what happened to that firm (almost went bankrupt and had to be bought out)!
This seems a bit elitist, as many "little" people who use Mac hardware and software don't necessarily spend thousands on a computer with a built-in limited useful lifespan with careless abandon, or spent what limited funds they had just to get "into the game" with a computer and system they feel can provide a more enjoyable experience than alternatives like Windows. Not everybody is a "pro" who can write off any costs on taxes or justify an addition that can be written off without concern for costs as a business expense. Actually, I don't know of any business that can survive with that "spend with no limit or concern" policy without spending themselves into a very nicely equipped bankruptcy. Real business needs to contain costs and invest profits back into growing the business, not increased spending for tech toys. (Don't give me that "if I save 10 seconds a day, I will save 300 seconds a month-that's real money!" stuff. The time saved will be wasted waiting by the coffee machine anyway

)
This device is not strictly for a high end new Mac Pro, is it? Isn't it for Thunderbolt equipped computers in general? For instance, if you have a Mac Mini with Thunderbolt port, and want to add a SSD without removing or rebuilding the case, or, a student with a MacBook Air who wants to doc the computer after a day of classes, or an office worker with a MacBook Pro used in a home office, or any other ordinary day-to-day Mac user...are they not intended targeted customers for this product? Or, is it strictly for the person who spends thousands on a computer and then wants to spend thousands more without concerns for what it costs.
My point is, this docking port is very expensive. Now the company making it has the right to charge whatever they want, or whatever the market will bear (that's business!), and decide to withhold it for as long as they want until every possible enhancement can be accounted for disregarding revenue stream (because as they say, there is a ground swell of public reaction demanding Thunderbolt 2 capability, who would rather wait then settle, and they apparently care so deeply for their potential client's wants they are willing to delay release until the lily is guilded), and that's fine. That still does not change the fact this costs alot. So much so that many won't even consider it regardless of benefit becasue their limited budget needs to be spent (or saved) for something else, like the next Apple hardware version release, or some useful software, or a digital camera, or whatever, and reject this item regardless of how useful it might have been to them because it ties up too much saved/reserved cash. Or, it just hurts to have to spend this much for so little. These are customers this company is snubbing by setting the price at such a high level. Businesses in general don't normally want to do that, unless they intentionally want to limit the potential market for the product because of a high break even point in manufacturing costs pays them to limit production (and they are really seeming to be limiting production by sliding that release date further and further from the original target, aren't they!).
You may not care if you have no intention of buying this in the first place, but if you did have a use for this dock, and you are otherwise interested, or just plain don't care to be ripped off by Sonnet just because they can, then you may just want to express that the cost for this peripheral is just not worth it. You may also come to the conclusion that Thunderbolt, although a promising technology, is just too expensive to be practical for any peripheral to sell at volumes permitting reduced unit costs, there are less expensive alternatives (like USB 3.0 and others to yet come) that will set the standards because they can gain market traction in numbers large enough to establish a standard, and Thunderbolt (1 or 2) is destined to be doomed to an early death because it can only be afforded and used by the elite who need not concern themselves about costs, only wants.