In reply to hindu:
> why dress for 5% of the time when you'll need a fully waterproof membrace
Agreed. OTOH, there are days when you're lucky if 5% of the time you _don't_ need a waterproof membrane...
I don't think 'soft shell' is a miracle technology, or anything particularly new; it's just a name to describe a certain type of clothing, that is suitable to certain applications and environments. The only thing particularly novel about it is the improved water resistance of _some_ new materials, which allows them to take the place of a true waterproof shell in moderate conditions.
The likes of Dave Hunter would (I think) suggest that the soft shell layer is never removed, and extra insulation, if needed, is added on top. Since my temperature is very dynamic, and dependent on activity, I can be sweating furiously in nothing more than a base layer, even in the depths of winter, if slogging up a hill, and there's no layer that's going to stay on all the time (except the base layer, to protect sensitive souls). Since that means I accept the idea of layering and de-layering to suit needs, I may as well just rely on the flexibility afforded by a base layer, a fleece, a water-resistant windproof, and a waterproof, i.e. the 'traditional' layering system.
This is, of course, not to say that I don't own a PowerShield jacket, two microfibre/microfleece jackets, a reversible pertex/100m fleece jacket, a windproof laminate fleece jacket, a Schoeller jacket etc...