I'm getting into cardigans because they provide, in my mind, a bit of a finished appearance when I don't want to wear a jacket and don't want to wear just a shirt.  On a more neurotic level, I prefer sweaters that button and unbutton so that I don't stretch out the sweater while pulling it off, esp. if it's cashmere.  I recently saw an interview with the late actor Jack Lemmon who was wearing a cardigan over a thin turtleneck and thought he looked great.

The wearer looks a bit wooden, but nice outfit otherwise, esp the Sulka sweater

Bing wore a cardigan, and looked very cool.  Deano sported one occasionally, if memory serves, not looking any less suave for it.  Somewhere I've a clip of Jimmy Stewart sporting a cardigan, and he was usually pretty dapper.

But as someone else pointed out, so did Mr. Rogers, and we all know what that denotes!  No, I think the cardigan is one of those items that was important in in its time, but some things just don't need to make a repeat appearance.  I never want to see a Nehru jacket or a leisure suit or mock turtleneck fleece short-sleeve shirts with the half-zipper.  We could go further back in time, and realize that no man need a full-length raccoon coat, or spats, or a bowler.  Yet every single one of those items was a standard item in its day for men of a certain age.

And yes, Russell, I see the cardigan's appearance TODAY as trendy, even if it was trad in its day.

Pure cashmere is running a sale on cardigans.  They're based in the UK, making it an especially good deal for those overthe pond.  You might be able to receive an add'l discount if you ask for a "source code" for new customers.  Very high-quality, 4 ply sweaters they make in their own factory.

http://www.purecollection.com/
http://www.us.purecollection.com/

Absolutely - It's all about the classics.

Cardigans have never been 'in' or 'out' over here so they've remained 'traditional' for us.