Why no benchmarks against pg_vector, DuckDB with extension?

For benchmarks you may just prepare Phoronix Test Suite module (https://www.phoronix-test-suite.com/) to facilitate replication on a variety of machines.

Also compare with LKH3 which seems much faster and closer to optimal.

Unfortunately the default configuration poses significant security problems, allowing for sidestepping 2-factor authentication schemes, and sideloading of applications without user permission (!)

Do they change IP numbers so often?

In bussiness it is not called "losing", but "investment".