Well gee guy, maybe it's also because not everyone uses SD cards. The one one I use any more is in my Wii. All my cameras use CF cards (including my PnS). So to me, adapters are a better choice. A built-in USB might have been nice, but not a SD slot (I'm still fuming that they put one in the MBPs.)
Well, if you used your brain just a little bit, you could then buy the 16GB (i.e.cheap) iPad and insert a how-many-GB-you-want SD card for half the price compared to the margin you will be paying for the 64GB iPad. That is, if the iPad had the SD slot (and ability to use it as extra disk space).
But I see, you prefer to spend $100 for 16GB of flash memory. Now you are exactly a person the Apple ecosystem needs. (As someone owning Apple stoct I am also happy that you exist

.)
And, could you please elaborate on how the presence of SD slot on the MBPs is making your user experience worse compared to a MBP without the slot?
Oh, and BTW... how is Apple like Microsoft when it comes to the ports issue? Microsoft is a SW company, not a HW company (unless you are refering to the Xbox or Zune.)
MS does HW (keyboards, mice, etc.) and SW (actualy, their HW is better than their SW

). But my point was that Apple is starting to act like MS. An example:
MS: Why don't we screw up Java, html, ... (choose what you want) a little bit, so that people will want to use only IE because the not-standard-compliant (MS-screwed-"standard"-compliant) web sites will only work well in MS IE?
Apple: Safari is the best for you, therefore no other browser (e.g. Opera) will be allowed on the iPhone/iPad (app store) because it just does what Safari is doing. Who cares that Opera mini is 5x faster (on slow connections, i.e. in the only situation when speed actually matters)?
I am really happy that at least in European Union, all mobile phones will have to have a mini USB connector for charging so that power supplies will become universal. I bet that Apple will include (on the iPhone) the connector for charging (because they will not have other choice in Europe) but they will not allow you to use the port for anything else...