I am a huge fan of the "Backend as a Service" segment (Supabase, Pocketbase, Appwrite, ...)

One of the big benefits that they all share is that they use a mainstream DB in the back (Supabase -> Postgres, Pocketbase -> SQLite) so you have a possible upgrade path if you need it - Is this the case here? I can't even easily tell what it uses as a DB, SQLite?

Also Authentication and more importantly Authorization are so prominent in the other BaaS I mentioned - completely missing here.

Not to disregard what this project is doing, but it might be better suited as a CMS that has some backend features... like for forms or appointment booking. Nevertheless, if I find a need for it in the future, I'll surely try it out.