So did I, but as I ran lots of other things on the slug my stick just was too small.
I then re-slinged to a harddrive and am now happy with tons of applications available and running on the slug.
Anyway, I too had the library on the hard drive, and the database on the stick. Worked pretty decent, but the wear-and-tear on the stick is hard, no doubt about that.
I wouldn’t be concerned about the hard drive failing so much, but for power consumption and heat dissipation. An idle harddrive that spins basically doesnt wear.