Initially, I used vim emulation within Obsidian, but later realized that I didn’t need to know about backlinks very often—I just wanted a simple wiki, so I started using vimwiki. The main downside for me is that you can’t (to my knowledge) use folders without changing links ([[folder/note]] instead of [[note]] in Obsidian), so all my notes are in one directory with no subdirectories. I also don’t think renaming files in vimwiki updates links in other files like in Obsidian. Because I prioritize using my own vim config over many of the features in Obsidian, I use vimwiki. Whenever I need something that Obsidian can do that vimwiki can’t, I just open Obsidian. I love owning my notes in plaintext :)

Well it occurred to me after reading this thread that I could edit my Obsidian vault via vim. Of course, that's only for basic text editing capabilities everything else has to happen inside Obsidian.