I can't tell if you're parodying HN here. This is from someone's blog and is a personal reflection on his most important work of the past 10 years. Do you expect everyone to be an historian?
I expect an article titled "Ten years at Google" to talk about someone's experience at Google over the last 10 years, not a project that started in the last 5. If that's "being a historian", tell me why that's bad.
There's nothing bad about being a historian nor is there anything bad about writing about your most significant project in ten years. Both are aligned with the title.
