[zeroCalories]

Unless we can tie compile time benefits to an increase in revenue(which maybe you did?), this is not a quantitative decision, it's more of a gut feeling. Measuring the impact of tools on productivity is hard, and IMO borderline pointless. This is my main contention with the article and your post. Perhaps you tried to do some napkin math on time saved * hourly cost of an engineer to determine productivity gains, but that's a very shaky model. Personally, when my compile takes longer than a few seconds I'll just go read some emails or browse the web. The few seconds gained are just washed away by me reading and replying to an email. I suspect most people are like this. I would need to see some large scale A/B testing on the number of PRs or something to know that this has saved substantial time. My main concern with collecting and using stats like you did is that I feel like you’ve gained unjustified confidence in the project. All that said, I still enjoyed reading your post, and I don’t mean to denigrate your work. I may have chosen words stronger than I can justify because I may have missed something in your post, and knowing that there is a difference between the M1 and M2/M3 laptops is definitely valuable for making the decision.