However, if you are thinking of a specific device or tool (e.g., "DLC Boot" in RKAndroidTool, Mediatek SP Flash Tool, or U-Boot), please provide more context — I can give a precise, helpful explanation of its use and safety benefits.
If you meant as in Downloadable Content boot on gaming consoles (e.g., Xbox 360 or PS3 modding in 2016), it might refer to a method of launching DLCs that required a specific boot sequence or signature check bypass. dlc boot 2016
refers to a feature found in certain firmware or custom recovery environments (like TWRP or similar) around 2016. The most likely helpful aspect is: However, if you are thinking of a specific device or tool (e