Once lived in a two story rental house, built in the 20's. The kitchen on the 1st floor had a vent by the stove. I wanted a dryer, so I moved the stove over (which being modern had no vent) and ran a metal duct from the dryer to the stove vent. It worked great. Never seemed to clog the chimney, either, but that may be because the chimney was at least 8" diameter. I would check the clean out at the bottom of the chimney tube from time to time, but never got much lint down there, either. I would also check with a mirror and flashlight to look up the chimney pipe, and never saw much lint stuck to the walls.
After 12 years I moved out to a mid century (well, '41) home with a standard horizontal 4" diameter steel duct running about 15 feet from dryer to outside wall down in the crawl. It does require brushing out every couple of years. I keep an eye on the dryer vent louvers... when they don't seem to be as horizontal as usual, and/or the dryer itself seems to take longer and its cabinet gets warmer than usual, I know it's time to brush out the lint buildup. One of these days I'm gonna insulate the outside of the duct in the crawl to reduce condensation inside it, which in turn will reduce lint buildup. The kitchen vent in the previous house ran in the middle of the structure, so it probably didn't have that kind of condensation issue.
