I’ve always used hyphens because if I later need to look at or parse the source, it may be difficult to tell what my intentions were. Moreso if for whatever reason I need to code something to handle my files—an unlikely case, but the small effort over time will be instantly realized.
In Obsidian, I can easily indent a bullet point with tab and Obsidian uses tab indentation by default, is there a way to change that (to space indentation)?