Also it’s already available in plugin community list by name “Drag-n-Drop for blocks”.
It was inspired by Logseq drag-n-drop functionality for fast creation of embeds. If you drag-n-drop without modifiers it will create reference to the block, with Shift it will copy whole block.
If you drag inside the same note without modifiers - it will just rearrange blocks
This feature not being available makes me shy away from using Obsidian for quick-list-tasks, such as grocery shopping, because sorting lists is such a hassle.
Would like to put in my +1 for this feature as well. I switched to Obsidian as an alternative to Google Keep, and really missing the ability to easily move around checklist items such as a grocery or shopping list. Especially on a mobile device where editing is a little more difficult.