This sounds more like a 5 month POC that the engineer should have been able to prove sooner that DucksDB didn’t fit the use case.
Author here. We went past the POC stage to actually make real customer workloads work, which we did. Probably yes, we spent too much time not rethinking our approach but sunken cost fallacy so that's why.
Author here. We went past the POC stage to actually make real customer workloads work, which we did. Probably yes, we spent too much time not rethinking our approach but sunken cost fallacy so that's why.