I've seen this a lot online, but as someone who struggled to add this sort of data to my CV before, where exactly are people getting these stats?
Every company I've worked for either didn't know how changes affected things like uptime or conversion rate or page views or didn't share the information with the engineering team.
Do most people just make up these stats? Guess and hope it's somewhat correct? Work for companies that just happen to tell their engineering teams everything about the impact of their work? Actually go out and measure it themselves somehow, like throgh Google Analytics?
Just feels like it may be difficult for the author to show this sort of data, since they may not have access to it at all.