@NiallC. I've been on about 2 1/2 hours of sleep per night :), so have some extra time. I did take a rather long break over the past couple years, for those same reasons you mentioned. I also have much more time when it rains, like it did yesterday, and some the day before.
I'm starting to do less weeding and more cutting back, and on lawns, seeding, treating for clover and fall fertilizing.
@NiallC. The time put in an answer (not counting later editing) is usually between 5 and 15 minutes, so if I'm doing three answers a day, I find it very manageable timewise, and sometimes I (don't tell anyone:D) answer from my phone at work. Also vote and flag bad stuff, So I've usually been seen recently for most of the day. I get up at 5:30 am here, and may be up until 3:00 am. Not always, though.
And I have 4 new installs to do this fall.