Some of the Raspberry Pi products have had similar schedule slips:
The BeagleBone Black had a ~6 month backlog at shortly after introduction: Dude, where’s my BeagleBone Black?
From personal experience, I ordered a BeagleBone Black in January of 2014 and didn’t get it until July. I finally got my hands on a Raspberry Pi Zero (introduced November 2015) a couple weeks ago, though that was partly due to not being willing to pay a premium for a starter kit with stuff I didn’t need.
Also from personal experience, the CHIP is the first such SBC that I’ve bought, played with, and then placed a second order for more of the same (due in October, but we’ll see). The combination of features and price point are remarkable in an increasingly crowded market.