In a sea of note taking apps, Obsidian stands out from the rest by taking portability to heart and giving a first class interface to boot. The only downside is being limited to Markdown, and hacking solutions into it
Obsidian is by far the most valuable product I interact with on a day-to-day. I've been using it since the beginning and the evolution of the community and product is so beautiful. Obsidian is quite literately my second brain until I die.