This is not a good example, because there is no ‘standard/compatible’ internal links syntax yet: [](url://filename.extension)
is just an external linking using URL schemes. And wiki links are the closest to standard (as far as I can see).
I’m not worrying about incompatible image embedding syntax. I was just unable to find any other app (on Mac and iOS) to support this syntax and was curious enough to try to find the reasons of supporting exactly this syntax in Obsidian.
Speaking on this. Here is the quote:
There may be a good idea to introduce an option ‘Use standard image embedding syntax’ in Obsidian preferences for these, who are using their notes with other software.