Why was it so hard to pre-order the iPhone X?

Episode 1435 (51:46)

Brian from Nashville, TN
Apple iPhone X

Brian tried to go online to buy the Apple iPhone X and he noticed that Apple closed the store before it went on sale to get ready. Leo says they do that, but it's really absurd with modern website technology. It's just hype. He was able to get in and preorder and he's getting it Friday. Leo's jealous. Brian is going to miss the home button though.