I think it's electronics in general just being screwed right now. they are saying now that laptops, webcams, etc are all pretty much tapped out.There are supply chain issues everywhere for many things. I know it is not a camera but I ordered a Whirlpool brand refrigerator on June 6. It is a normal fridge in white so no big specialty item. The delivery date was first stated to be Jun 19, then June 30, Then July 27, then July 30 and now it is October 3. We will see if that holds. Right now I would not blame the camera delays on Canons' poor planning. It is a reality in many places.
while there's not the core in common, there's still common parts like resistors, caps, support checks, dc/dc converters and such used across multiple different devices that simply could be running out.
I made mention on twitter about this.
This is NOTHING to what Nikonians have experienced in the past with just about every prosumer camera starting with the D200.
A friend of mine was waiting for his D200 a nearly a year after the release. Finally ended up getting grey market of ebay.