I tried the same test on Hetzner VPS (4VCPU AMD EPYC, 8 GB RAM, 160 GB NVMe SSD), and the result is about 20K inserts per sec. It's not 80K, but still exciting, I would even be happy with 10K. I am sure there is a big room for optimizations, but I am planning to use SQLite3 with Python in a very simple way.

Source code of Python test file: https://gist.github.com/maksadbek/2385b002b439e03dc948b05593...