I think you might have sparked a business idea! Clothes for Coders. Couldn’t be any more ridiculous than when Tiesto released a shoe for DJing!
For me, slacks & a button-down shirt with an open collar. Not as constricted as a coat & tie or jeans, not as uncomfortably exposed as a T-shirt & shorts: slacks & a shirt feel Just Right™ to me.
Sure! But for a lot of people (especially men), roughly the same "decent clothes" are now decent for work, date night, going to the supermarket, going to your friend's rock show, going to the airport, family holidays, etc. In even the recent past, you could dress well or poorly, but you'd still have to dress more differently for different places.
I had jury duty earlier this week and was afraid I'd look like a jerk not wearing a tie. It turned out I was one of the few men wearing a collared shirt and slacks.
I dunno about that. When I see someone who's wearing decent clothes, I still think, 'wow, that's someone who wants to look good.'
But I think that I'm a bit weird — I actually enjoy dressing differently for different occasions: it helps me get into the right headspace. Programming while wearing hiking clothes would make as much sense to me as hiking in a tuxedo.