I see no sense at all in having a smaller drive as a secondary drive, be that SSD, IDE, or whatever.
The only conclusion i can think of is that because some people
(i was going to name names but probably best i don't) think that having everything in the Windows default partition is the only place to store data.... i'm surprised to hear we haven't moved on from that mentality!
I used to get such stick when i was an advocate for promoting full screen video on a dual monitor system, but now it's the norm (full screen video was once seen as the holy grail for the end of the world if you listened to the neigh sayers)... i'd love to know who some of these backward thinking manufactures are so i can...
educate them!