[fipar]

> Seems challenging to implement without losing significant performance to the abstraction layer.

Agreed, it seems the tradeoff would only make this worthwhile when you need to optimize for throughput, and a lot of the workload is ad hoc. A lot of distributed DBMS just serve point queries or range scans where I don't think something like this would be useful.

Troubleshooting production issues here seems challenging too (though that's always the case in distributed systems to this would be less of a problem).

Still interesting, but it would be more interesting to see the idea get some trial by fire.