Not sure what was the size of the team (likely started with the team of one) and how long ago the continuous work started. Nevertheless, having 40+ years of experience, I am awed with the sophistication of the design and quality the implementation.
This opinion came as a consequence of a very shallow and short dive. I did find a few situation where the docs are “behind” the current behavior - and this could be confusing to a complete newbie (class of people that you should care about more than any other).