Oh, I certainly took no shortage of flack for those early analyses, but I'm glad you appreciated them! Some of my clients have even expressed disappointment that my jepsen.io analyses for them weren't as snarky as the aphyr.com ones! It's a tough situation though--if I were to write snarky analyses, even for unpaid clients, it would raise the possibility that clients could pay for favorable treatment. So... I go through an extensive process, often involving weeks of review with my client and peers, to produce as accurate, professional, and neutral a report as I can.

There's another aspect to this: now that I've established a reputation and people take my work seriously, I don't have to be snarky or aggressive to get attention drawn to these issues. And the DB landscape has changed a lot in the last five years! Engineers want to provide formalized safety guarantees. Vendors are taking these failure modes seriously instead of dismissing them as irrelevant! Since I'm getting paid, I can invest more time into making these analyses real collaborations with the vendors. So I see my role now as more about helping people reach their safety goals, and a little less about shaming folks for making systems that didn't live up to their claims.

My other motivations--letting users know how to work with the databases they've chosen, and giving case studies to help other engineers test and improve their own systems, well, those are unchanged. :)