Obsidian is not able to open a local folder on my machine stored in Windows Subsystem for Linux, which for me makes it a non-starter (my personal knowledge base is stored there).
I personally prefer the Notion UI but hate being locked into their cloud, so I created an offline-first Notion alternative [1]. Offline mode is totally free (no user registration required), and aiming to add cloud syncing tomorrow or so. Still in active dev so needs a lot of work, but wondering whether others might find this useful. Goal is to make it be able to seamlessly sync across multiple data sources, and also easily to publish files/folders (eg. can currently turn folders into APIs when synced to cloud).