Apple doesn't have any issues to handle the orders from the distributors. The distributors cannot handle the orders coming from the resellers, because of incompetence and greed. They do not place orders when they receive them, they place them when they have a pile of orders. Delivery cost reduction and mass order cost reduction. Pure greed. And when they receive units, they distribute first to the selected resellers according to their gain, not according to who ordered first.
My order was for stock 13TB, nothing fancy. Every week they tell me "next week" and now its "You should consider yourself lucky if you receive your order before Christmas". Next time they'll probably tell me that I should consider myself lucky if I receive my mac at all.
So if the latest estimates are correct, I'll receive my MBP 13' TB STOCK ~90 days after I've placed my order.