1. I suppose so, but it did reach that at the DRAM high-water mark when Thailand flooded. It's a small concern compared to the humanitarian crisis, I suppose, but it left a mark on long-time apple buyers' memory.
2. I could cram four terabytes into my current Macbook Pro between my two bays, or using the latest from Western Digital, I can have a pair of 128 gig SSD partitions and 2tb of magnetic storage for the purposes of an enormous Fusion Drive. (well, for a laptop) A Macbook Pro currently goes up to 1 terabyte, and a Macbook Air to half a terabyte; you can't go higher for love nor money.
3. My choice would be to further upgrade my current machine, but it's a Core2 and I don't own a reflow oven. I don't think MBPs go up to 32 gigs RAM, because the modules haven't been invented yet. Also, while the SSDs are blistering fast, their absolute capacity isn't great, and their price-per-gig ratio isn't great either. I'd love to upgrade my machine as you suggest, but she's really at her limits. Had there been a 16 gig Macbook Air configuration, I'd have picked one up, never looked back, and been perfectly happy - but with the current lineup, every single Macbook offers some compromise I don't want to make. And every non-Mac means losing access to some really incredibly useful software - either repurchasing my commercial software on Windows or doing without on Linux, plus either doing without BASH (Windows) or well, I'm sorry to say, a lot of good software.