*tears hair out!*
Because it's ULTRA-portable. It'd be designed for travelling light. You wouldn't need to carry the external drive around with you.
Yes, you need some sort of optical drive to restore from original OS X disks or to import your CD collection to iTunes or whatever but these are
not all-day everyday tasks. If you purchase a new CD one day, surely you can wait til you get home in the evening to import it onto your computer? And if you're the sort of person who imports/burns CDs all day long everyday then no, an ultra-portable computer probably isn't for you.
(btw when I say 'you' I'm not having a personal dig; I just still think some people are missing the point of the 'ultra-portable' market!)
Again... why would you need extra ports on an ultra-portable notebook? It's not gonna be a desktop replacement where you'd plug external monitor/keyboard/mouse/hard drives/EyeTV/etc into it!
For me an ultra-portable computer would be something like this:
- Thin & lightweight (under 2kg)
- Latest or as close to latest chipset but doesn't have to match the same speed as the top of the range Pro machines
- 1GB RAM as standard but could be upgraded to 2GB, don't think you need any more than that for a 'travel' machine
- 10" to 12" screen with as high a resolution as is possible. Any more than 12" is portable but not ultra-portable IMHO and <10" doesn't make for a very easy to use keyboard. Screen should be easy to read outdoors.
- Built in iSight for keeping in touch with people when travelling
- Decent Airport reception like the iBook/MacBook, not like the PowerBook/MacBook Pro
- Good battery life and a smaller power brick
- Integrated GPU like the MacBooks would be fine; it doesn't need anything fancy as someone who does heavy-duty Photoshopping or video editing etc won't be the target customer for an ultra-portable machine.
- USB 2 and/or FW400 port just for connecting a backup drive - or if it's possible have one of those Port Replicator things as an optional extra (I had one of those with my very old Sony Vaio)
I bought a 12" PowerBook for its portability but very rarely take it outside the house because for me it's still just that little bit too big/heavy (I mean I need an extra bag to carry it in), which is a hassle, plus the Airport reception on it is pretty crap. I've been longing for something a little smaller/thinner with better wifi and battery life for so long now! One of these plus a MacBook Pro would be my ideal setup.
*dreams*