The Shiva Purana and Vishnu Purana contains some deeds of the Lord Shiva and Lord Vishnu respectively which had happened. Both Lord Shiva and Lord Vishnu exist even today, now they might be doing some deeds.
Now why aren't the current deeds of Lord Shiva and Lord Vishnu written? To be more precise, why aren't Shiva Purana and Vishnu Purana updated with the latest deeds of the Lord Shiva and Lord Vishnu?
For example, Lord Shiva's marriage with Goddess Parvathi, the birth of Lord Karthikeya, Lord Ganesha. In a similar way, what is currently going on now?
Is any rishi writing them currently? Are they updated every yuga with the latest deeds? What is current status of Lord Shiva and Lord Vishnu?