> I think async is the next thing that will happen.
Async or a few hours of common hour overlaps are really going to be a big contributor to work / life balance even though it sounds counter-intuitive. It's counter-intuitive because it could mean working outside of "normal business hours", but this is often exactly what you need to do if you want to do things on a whim (aka. having some type of work / life balance).
Right now a lot of remote companies expect working hours between 9am to 6pm, that doesn't really leave any room for much of a work / life balance. By the time you get a chance to relax, prepare dinner, etc. it's already 7pm or even 8pm if you need to run errands. Even if you wake up at 6:30am it very quickly becomes 9am after doing a bit of exercise, breakfast, shower, etc.. If you're up at 6:30am you're probably pretty drained by 10pm. After dinner that leaves you like 2 hours to live your life and maybe fall asleep to a movie or book.
Basecamp seems to have a very good policy on this. I forgot where I read it but I'm sure I once saw DHH mention that you can work any hours you want as long as you overlap 3-4 hours with CST and put in ~40 hours a week (~32 from May to September since every Friday is off). This is IMO a great first step towards async.
It means you can on a whim decide to leave at 2pm EST because you worked from 10am to 2pm EST (9am to 1pm CST) so that you can go swimming on a nice day but you make up the hours later in the evening, or maybe you shift your working hours so you always finish by 2-3pm EST because your best working hours are really early in the morning and occasionally deviate from that for special circumstances from the business as needed.
The hard 9-6 rule means pre-scheduling PTO with a lot of notice for things that often require little to no notice. I know some companies will let you occasionally take a couple of hours off without officially filing for PTO through HR but these often need a decent amount of prior notice unless it's an emergency. Basically it puts you into a position where you always need to ask permission instead of just doing it and be trusted to make up the hours.