Indeed. Plus, I'm not sure you will really feel the real benefits (other than quick bootup) of having flash on-board unless the apps can live on the SSD, and 8-16 GB is just too small for that for most folks who'd be buying a MacBook Pro.
Mm. Also, if you are heavily paging out, you may fill the SSD and that is not good by any means. You need at least several GBs of empty space for the OS to function normally. Another issue would be the life span as you would be writing and rewriting to the same blocks all the time, meaning that sooner than later the NAND would wear out.
32GB should be the minimum, preferably 64GB.
I'm pretty sure that isn't true if it's designed right. It's the whole purpose of "Turbo Memory"
http://en.wikipedia.org/wiki/Intel_Turbo_Memory
That would require the HD to enter sleep mode (i.e. stop spinning) every time you're not using it. Not a very practical option as it will then take several seconds for the HD to spin up. Another thing is that most SSDs use pretty much as much energy as normal 5400rpm HDs.
I guess we'll have to wait and see but there would anyway be an extra component to power. SBs are so efficient so the battery life won't go down, that's fairly sure.
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