I love duckdb but I don't understand your second point. How does duckdb wasm decrease the latency of network calls in your app?

Not OP, but depending on your use case, client side operations could be a big deal.

Something like a dashboard app for instance, might have callbacks where it needs to run a new SQL query based on input, but be small enough to make loading all data onto menory and querying locally a mich faster option.

Obviously ymmv and if you have a dashboard with a heavy data set under the hood, your gonna make a lot of users unhappy fast by doing that.

for many uses cases, you can cache a dataset client side that can be re-queried to avoid network calls