One of the biggest pros of Obsidian is that the files are stored locally - on your device, not servers somewhere in the world.
Whenever your data is stored elsewhere you have two potential issues:
Obsidian uses text files which means that if I ever want to go elsewhere it will be a simple and painless exercise to bring my data with me.
Markdown is the most popular way to format plain text. Add common characters like asterisks and dashes to text, much like how you might format a quick store list in your notes app or add emphasis ...
Or do you use the Linux subsytem in Windows, emulation tools like DosBOX and WINE, or mobile device emulator/simulators? What's your favorite ways you've used virtual machines and emulation?