I’ve seen these types of efforts in the past where people wanted to cut content and refer back, but I only wanted copy and refer to the topic mentioned, and the best method for me is to copy the block id with a script (or *plugin, not sure Obsidian core 1.8.x can do it internally yet) and CTRL+V the embed link in the other file, where it is you are tracking where that semantically fitting part should go.
I am all for automation but I want full control and append is way sub-optimal, if I need to cut from the end of the file again and place that reference somewhere else.
* Plugins:
- Copy Block Link
- Carry Forward
(I decided to not add my script as it is currertly too personally customized for Zotero use.)