Timing with the AK47 coming out not all that much later, is why the SKS carbine is less disirable. It's job is the same as an AK and almost as simple to break down, for cleaning, SKS's can go w/o cleaning and is just about as durable. It is what it is.
I'll 3rd that, my sks gets more action than any gun in my house. I did remove the 30 round clip in favor of the stock 10 cause I find it easier loading.