I can second the "more time for subconscious to noodle around" benefit. I spent 7 years working remotely part of the year while living in coastal South America

I can second the "more time for subconscious to noodle around" benefit. I spent 7 years working remotely part of the year while living in coastal South America, and I've been transitioning to a 3-day week now that I moved back to the States and married someone from my hometown. I believe it results in better software. (For contrast, I had a previous approach which was itself pretty good, if somewhat adventurous -- I took fewer projects per year, with a target of working only 1 day out of every 4 in a year. That way, when I worked on a project I was able to be unreasonably focused on it because I was craving collaboration).