This is a funny thread to me because my frustration is at the intersection of your comments: I keep wanting sqlite for writes (and lookups) and duckdb for reads. Are you aware of anything that works like this?
I think you could build an ETL-ish workflow where you use SQLite for OLTP and DuckDB for OLAP, but I suppose it's very workload dependent, there are several tradeoffs here.
Right. This is what I want, but transparently to the client. It seems fairly straightforward, but I keep looking for an existing implementation of it and haven't found one yet.