So popular they won't release the weekend sales figures.
So now you're being contradictory. It's either popular and there's issues, or it's not popular and so people wouldn't be getting as upset as they are.
Apple have manufactured a lot of phones across 90 variants. The iPhone is a very popular product. Until just 7 days ago, they weren't sure which were the most popular variants. They've had to build a sustainable supply chain initially with a bit of educating guessing, now to meet understood demand for each variant - but still in a sustainable manner with capacity (raw materials, manufacture, warehouse, shipping, carrier/retail, courier, staffing, etc, etc)....
I'm being entirely logical here, and explaining how and why I think things are the way they are - and supporting my point of view. It appears you already have a narrative whereby you've found the answer without understanding how to get there, and that can't be substantiated or supported through logic. That's your right, and I respect that. I'm just not getting to grips with the post-facts and post-logic world. Maybe I'm an old fart in my mid thirties, I don't know... But the change to the modern "negativity rules", "if it adds up, it don't add up" world is difficult for me....