They're free to enjoy their time, no longer needing to trade it away for money. (dividendmantra.com)
If you think the security is already well priced, the downside of a limit order is the price may never hit your limit and keep trading away from you. (money.stackexchange.com)
You spend a decade or two looking for them, and you can't just trade them away to get a younger model. (sbnation.com)