They locked down the SQLite database so that you couldn't use it with 3rd party tools (such as your own commands, or to export). I am not sure if this got reversed, but at the time it was what triggered me to switch to Zotero. (Still using Zotero, which does everything I need it to.)

One thing I like a lot about Zotero is that they charge a subscription once you get over a certain amount of cloud storage, which gives me more confidence that they'll continue to exist in the future.