Over the years, I came to realize that usage of some test doubles and popular patterns in test code can actually be an indication of a deeper design problem in production code.
is to invest in making experimenting and trying out ideas cheaper in order to sooner bring relevant data that can inform our decisions and reduce uncertainty as to what to prioritize and where to invest.
for reviewing their PRs (or any other help they need), your problem is not people not prioritizing other people’s work and lack of “team player spirit”.
by hiring more people, don’t be surprised to see the culture of ineffective parts of the organization eat away the culture of effective parts of the org, which doesn’t have a need to scale at such a rate.