Notebooks don't sell anywhere near the velocity of an iPhone so building up a bit of demand by having short inventory isn't necessarily a bad thing. I must have sold 5 units myself by all the attention I got with mine at Starbucks and in airline lounges this past month, sometimes creating a unicorn is good for business.
Apple runs the best supply chain in the world, the RMB is not indicative of how they are dropping the ball. Other priorities- like the Watch- were more important.
BJ
I suppose you are saying that Apple is doing this on purpose? For marketing halo effect? Or that the

Watch launch is making the rMB launch lower priority? Well, the

Watch launch was/is even more of a fiasco, so big fail there. A limited amount of articifial demand is a good thing in a halo product, but that only actually works if the product is actually marketed as a limited edition item. That's not the case with the rMB. There is no

Macbook Edition that costs $20,000 as with

Watch Edition. The iPhone 6 didn't sell in record numbers because it was hard to get or a limited edition item - preorders alone destroyed all previous records, and they were pumping them out in the millions and millions as fast as they could.
The thing is that there are tons of rMB's out there, just apparently not in configurations that people want or are willing to compromise on. It seems that people are actually more stubborn about this aspect than Apple may have taken into account. Same with the Watch. This may be a big part of the problem. For instance, I am not willing to get anything other than the SG 1.3/512 rMB. If I could get the Silver 1.3/256 tomorrow at Best Buy, which I most likely could, I would pass. Same with the Watch. I am only going to buy the SG SS 42mm with matching link bracelet band, so if I could get the Silver SS 38mm tomorrow, I would pass.
I think a big aspect of these launch problems are the sheer amount of different configurations, that Apple hasn't had to deal with on this scale before. With an Apple laptop you used to just configure the RAM, processor and storage. Now the actual chassis has become configurable, so you have three different colours there - it is a lot harder to manage inventory, supply and logistics when you essentially exponentially increase the number of configurations that have to be taken into account. Same with Apple Watch. Packaging the bands with the Watch seems a ludicrous decision from a logistics point of view, as the actual high volume chassis choices are limited to four (not taking into account the Edition) with zero choices for internal configurations, making them actually less cumbersome than iPad or iPhone. Had the bands been sold separately, and had production not been limited due to reported yield problems,

Watch would probably have rolled out at least as smoothly as the remarkably decent iPhone6 launch.
Another aspect is the bizarre and frustrating 3rd party resellers treatment, where not all are being treated equally. Best Buy for example, appears to have an abundance of base and mid-range configurations in all colours - same with MacMall. Others, especially outside the US, are getting lower priority than individual consumer orders, so they basically have nothing. Those holding out for a maxed CTO build in any colour appear to have to order directly from Apple and wait.