This is cool, but I'm curious to know what took 16k commits. The projects that I've been on with more then ten thousand commits had many dozens or hundreds of folks working full time. And to crank that out in 1.5 years! That's 22 commits per day, every day. That's a fairly meaty engineering org's cadence. Is there some complexity that needed to be overcome that the post doesn't get into?
For comparison, the WordPress REST API was about 4k commits over ~4 years or so (prior to us merging it into WordPress itself): https://github.com/WP-API/WP-API
(That said, commit count is a pretty useless metric.)