A couple of comments on the interview:
1. Apploading is NOT sequential, it has a high ammount of random reads. This is why SSDs are so much faster than harddrives at it. You can see this in PCmark vantage, where harddrives get 4-10MB/s in apploading, and SSDs go from 80-160MB/s.
2. Booting from an SSD over USB 3.0 is wastefull. Most SSDs support NCQ, and get 3-8x higher random read IOPS when NCQ is active, and this is noticable in everyday use. USB 3.0 does NOT support NCQ.
3. You say Windows 7 requires minimum 16GB to install, wich is true. The PARTITION must be minimum 16GB for the installer to allow it to be selected, however you can reduce the size needed for windows a lot. My windows folder is 13,5GB, and even with 20+ apps installed (MS and Open office suites included) i still use less than 20GB on my C: partition.
The need for a pagefile is reverse proportional to your ammount of RAM, if you have 4GB or more RAM you can safely deactivate it for normal general computer usage and save a lot of space.