How they get their laptop back is their problem. Just ask them. But to answer the topic question, it seems that a recently-made-popular strategy is start on th

How they get their laptop back is their problem. Just ask them. But to answer the topic question, it seems that a recently-made-popular strategy is start on the newer job and keep the older one in low-priority mode until you get fired for low performance. Apparently it might take years depending on how the environment allows you to coast. But I wouldn't do that, and this may be illegal to do depending on your specific situation, jurisdiction and contracts.