[badtuple]

I would definitely do so.

I'm a single person who isn't looking to start a family, so I don't really use most of the money I make. It'd give me time to work on my more esoteric/mathy/experimental programming projects that I enjoy. At this point in my career getting job offers is pretty easy, so I wouldn't take a pay cut for no reason...but trading back time sounds super fair.

Of course, I'd have to talk to the company to make sure we agree on what the boundaries and expectations are. Just like with the current 5 day set up, ambiguity can easily be taken advantage of or lead to unexpected outcomes for both parties. That's not a reason to be hesitant, it's just a reason to be explicit and make sure everyone is upfront about discussing it maturely from the outset.

Like others, I've worked at a company who had fridays off in the summer and it really didn't hinder productivity at all. We just planned accordingly.