Very cool, love the idea of JS/WASM extensions. In the past couple of years I've seen other new entries in this space - CockroachDB and Planetscale come to mind. What would you say makes SurrealDB unique, if you don't mind me asking?
Then with the ability to connect directly form the client application or from web browsers, you don't have to build any API layer or logic layer in front of the database. Your data access permissions and authentication sit right inside the database (only if you want of course), enabling you to build applications quickly, directly against the database.
As for direct client connections - Firestore uses that approach as well. One issue with them is that your only means of security is the Firestore Rules document, which is a single script that doesn't offer much flexibility. What I've learned from using them is that if you're going to offer a direct client-to-db interface, the rules expression needs to be pretty sophisticated. Not giving advice, that's just my perspective as a potential customer. I'll take a look through your docs and will probably try it out.