Diablo III is doing hardcore mode wrong. … Let me get the most glaringly obvious point out of the way. Diablo III requires an internet connection to play. This means lag. This means that you WILL die due to circumstances which are beyond your control. No internet connection is 100% reliable. Sometimes the Blizzard servers cock it up, and this will happen no matter what premium you pay for your connection. Therefore, as enticing it is to take a hardcore character seriously, the fact that you are at the mercy of the internet connection turns what should be a test of skill and caution into a veritable lottery. If your name gets pulled out of the hat you win a one way trip to permadeath.
— The Mighty Viking Hamster
LotRO guides to the Undying title recommend against always running the easiest, safest content. If you have out-leveled the content, you are getting very little experience, while you are almost always safe enough on blue content. You are in a race with lag spikes and random perversity; given enough hours, your character will die due to no fault of your own, so if you want to achieve X before dying, you must reach it before “enough hours.”