Sometimes I am. Other times I completely fail. Occasionally I can be watching something on tv, making something for the sims, talking to a friend via trillian or text, and browsing tumblr... albeit very slowly.
Last week I had Sims4 open working on my "apartments" and was was talking to a friend, but I kept getting distracted by youtube. Wound up forgetting all about the game being open for like two hours.