A few weeks ago, I replaced my flexible dryer vent with a rigid kind.
One of the premises is that the flexible vent increases fire risk. While I think that premise is way overblown, I changed the vent anyway to be on the safe side.
I now know that better dryer venting can dramatically reduce your clothes drying time! Drying a full load of jeans used to take 90 minutes. The new dryer vent cut that to 50 minutes.
Drying clothes costs real money, so this dryer vent replacement will make a welcome dent in my utility bills.