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Personnally I use tags for this usecase, I tag every single note in obsidian and I use a plugin called Tag Wrangler to show my tags as a tree. Tags then act like folders (for example a tag #python/pip will be under python > pip).

Pros :

- A note can fall under as many tags as you want

- The map view is pleasing to watch because tags can be shown but folders cannot, it also helps to categorize orhpan notes visually

Cons :

- You have to maintain the habit to tag each notes you write

Finally, Tag Wrangler allows you to rename / edit tags in bulk so that it is close to be as fluid as moving notes between folders.