A decado ago, only real locals and diehards wore traditional dress.
Nowdays, trachten is chic and you'll see many young people wearing it - not only at Oktoberfest, but to beergartens, summer festivals, bachelor(ette) parties (polterabend), and FC Bayern games (lederhosen bottoms, no suspenders, and an FC Bayern jersey are the outfit for the cool Bavarian guys).
Even Ken and Barbie are in on the trend!
Vogue Germany ran a ten-page trachten special promotion spread by Munich department store Loden Frey in its magazine, covering more than just the normal dirndl and lederhosen wear (Frau A wants those boots and the red jacket!). 
And if a good classic pair of deer-skin lederhosen aren't quite enough for you, there are some designer alternatives...Hugo Boss has lederhosen for the modern brand-conscious man.
"Only" 399 euros for the shorts and 499 euros for the dirndl...Of course you'll also need the shoes, which run almost the same price as the trachten.
Even Tommy Hilfiger has lederhosen, albeit for children.
For the more sporty, but still fashion-conscious man, Adidas offers Bayern Munich lederhosen!
But it doesn't end with lederhosen and dirndls...These days there are trachten accessories - either to personalize your trachten, or to wear as a little bit of kitchy Bavarian fun (instead of the full costume).
Here are some typical acessories, which now also come in fashion versions for big prices. We'll cover trachten trends in a separate post, but in addition to the standard 3 piece dirndl (dress, blouse, apron), dirndl shoes, dirndl purses, and dirndl jewelry are almost obligatory. That's even before we get into the super trendy hats, stockings, sweaters, and hairstyles! (these beer mug ballerina flats are cute, but are going to cost you 170 euro! Frau A is thinking "craft project")
And what if you want to add some trachten to your casual style? well, luckily there are bathing suits!
Finally, Austrian store Tu Felix Austria takes trachten-inspired casualwear to a new level, with men's underwear and sports lines (and funny, obviously photoshopped photos of models in the Alps).
And some pretty cute onesies to start the little ones off on the right foot!