Also dwarves will keep a lot of worn cloths as their possessions effectively rising fortress total item count (and thus lowering FPS).
I've seen this stated a few times, but it just does not happen in my forts. Is it possible this behavior differs across platforms (Mac, Windows, Linux)? Are the people who experience dwarves hoarding old clothing without cabinets all running on a specific platform?
I *always* experience this behavior. My guess would be that there is something about the way you manage your fortress that is preventing this from happening.
While dwarves may not carry their worn out clothes back to their rooms if they have nowhere to store them, they will certainly shed their cast-off clothes inside their rooms, adding to an ever-growing mound of rags. You could be avoiding this problem by only producing clothing in limited quantities. If there are 20 dwarves who want a new cloak and you only produce 10 cloaks, all of them will be immediately snapped up by "no job" dwarves (leaving their old clothes at the meeting area they were hanging around in). By the time your room-dwelling dwarves ("sleep" and "on break" tasks) are able to pick up new cloaks there are no new cloaks left. If you produce a constant oversupply of clothes, though, room-dwelling dwarves will see new cloaks available when they wake up, and leave their old cloak on a tile in their room.
Hmmm, I wasnt aware dwarves ever used a 'garbage dump' zone without you actually flagging for dump.
There is an option on the standing orders screen which enables this behavior; it is disabled by default.
I was infact always sure that this 'clothing decays' thing actually takes place in a refuse pile, not a garbage dump.
Garbage dumps do not cause decay, only refuse piles do. You can, however, garbage dump stuff onto/into a refuse pile, where it will decay as though it were placed in the pile normally. (In the general case, items that "end up" in a stockpile tile are treated as part of the stockpile no matter how they got there. This is relevant to the topic at hand, since any "only new clothes" stockpile will gradually fill with old clothes as dwarves who are standing on the stockpile drop their worn-out clothes.)