There is the 'Hybrid' drive (no, not a toyota) made by Seagate that has a SSD and mechanical disk combined in the one device.
Your thoughts, stripes, are probably the same kind that prompted the construction of such gadgets, basic o/s on the SSD for fast reading and then the mechanical for thre swapfile and similar activity
Toad is right too, dont defrag 'em, but do run a tool called Trim regularly, it does do more than a simple defrag
the drives DO have a huge 're/write cycles before fail' figure tho, so a lot of the concern expressed here may be unwarranted
The drives can generally outperform the connection bus even the SATA bus speeds...
Either way, i still dream of a 500gb 'hard card' that lives in a PCIe-16 slot....
We all used to dream of a machine that was so fast to boot u didnt have time to even contemplate fetching a coffee and donut before the trusty desktop was there and ready to work
HDD's in any form, have been the slow-point in PC operation and even back in Win3.1 days, we knew how fast things COULD be if we didnt have to rely on the spinning platters, let alone loading DOS from a 5 1/4" floppy...
I would love to see folks like AbRASiON in the commenters of the above story be forced to endure 1 year of Win 3.1 on a 386SX with 1 Mb of RAM and a 100Mb HDD...