Steam Families appears to have introduced a feature for controlling playtime, restricting when a child account can play to a certain schedule. It also contains detailed playtime reports.

My suggestion is fairly simple - I'd love to be able to use this functionality directly on my main Steam account. As someone who can get carried away gaming in the evenings, having the ability to set a schedule after which games are turned off would be a very helpful nudge for me.

Currently the only way for me to take advantage of this new functionally seems to be to make a new child account and associate it with my main account. However, this would mean losing access to all of my cloud saves and achievements for existing games.

Since this functionality already exists, would it be possible to port it over to "normal" Steam accounts as an optional feature?