I'm a fan of slots and USB support, too, but don't expect them from Apple.
Apple has huge profit margins, so it's not a matter of it commanding high prices because of the materials it uses. It sets those prices because the market will bear it for Apple's combination of hardware and ecosystem.
Apple does generally make solid devices, but so do other makers, and plastic isn't a prob if used appropriately.
Let's face it, with tech gadgets, the hardware is outliving the firmware and we're all dumping gadgets and trading up because we want better features, not because the hardware has given out, in most cases.
I have a boxful of obsolete tech gadgets, including ones made out of plastic (like my old Palm Pilot), and they're in perfect physical condition all these years later. I don't need tech gadgets that will maintain physical integrity for decades, because I don't expect to use them that long. None of us do.
Oh yes just yesterday I again packed up a box of old Computer stuff and my six year old HP desktop computer "less the hard drive I never let any of my H.D.s go" and dropped them off at a local small home town computer store. Not the first time I have given them plenty of what I paid hundreds of dollars for just a few short years before. I have a bunch of digital cameras in my safe. A Kodak 280 Canon G5 G7 G10 G11 now a new G15. Also a Canon 50D 60D and a 7D hope these will be useful for a few more years.
On the subject of Best Buy I have been in their silver rewards program for about four years. I just noticed a message in the rewards section addressed to me, it said "unless you buy $1,500 dollars more from Best Buy before the end of this calendar year I will lose my silver rewards status. "Oh!! My!!..My little World just came crashing down.
I wanted to see the new Canon G15 a week ago at my local Best Buy, was told it would not be sold or seen until Oct.20 or 21 well I noticed it was being offered on Amazon.com with free shipping included,since I read the threat message and I feel Best Buy was threatening me I thought lets just buy the G15 from Amazon ordered it on a Friday was holding it on Monday and with the free shipping. In the past all my cameras and new T.V.s were bought at Best Buy. I also asked a while back about a Galaxy 10.1 note with 32gb memory, was told they only had the 16gb one. So back then I checked Amazon found a 32gb Galaxy 10.1 note with free shipping placed my order.
My Apple guy told me it would be in November before I could even think of ordering the new iPad's. It just seems like a lot of people are shooting themselves in both foot and head.
I forgot I had a Apple II sold it many years ago.