I’ve thought about it in recent years but so far, at least where I live, it is still manageable without. Days where it doesn’t cool down enough during the night to survive the next day (opening/shutting windows and blinds) are still rare and don’t last more than a few days at a time and it takes a bit for the house to really heat up.

If/when that changes and heat waves with still hot/humid nights get more common or longer, I’ll have to get a solution for at least a room or two.