@u1mp3 I can’t find the original post in which we were advised to save frontmatter for plug-ins, but it is out there somewhere! Maybe a search through the Obsidian Release notes (for when they first allowed “alias”) will give you an idea.
Basically it scared me a little, because I kept imagining doing all the work involved in creating/updating yaml frontmatter only to have it wiped out one day by a plugin that decides to create frontmatter for me. It is still up in the air how Obsidian wants to handle it.
I did have a follow-up post about it though. Not sure if it will be useful to you.