Any time the grass is still wet is too early to mow the lawn. That usually means mid-morning, after the dew has lifted. The clock is mostly beside the point; the condition of the grass is the real signal.
If you're asking whether self-emptying robot vacuums are worth it, the honest answer is: it depends on how messy your home actually is. These machines sell a specific promise press a button, and you're done for weeks. For the right household, that promise mostly holds. For the wrong one, you're paying a premium to trade one kind of hassle for several others.
This could happen when you trust a guy to hang out wet clothes. Ladies, beware, guys simplify housework simply because they don't care of it's a chore they just don't want. Watch and learn to be creative about the ways you spice your every day chores up. Most of all, laugh your head off.