We seem to be looking at the same text and drawing wildly different conclusions from it. When the blog post says "the actual product decisions and working code

We seem to be looking at the same text and drawing wildly different conclusions from it. When the blog post says "the actual product decisions and working code were reviewed much less. Only the other PMs on my team reviewed my specs" referring to Microsoft, to me that lines up with you saying "I find product changes are reviewed by a dozen people at least and take months to finalize." referring to Google. The distinction the author is drawing is that Microsoft doesn't review day-to-day engineering work like this, because fundamental product decisions are made at a higher level, while smaller design decisions might be made by individual PMs or engineers and make it into the product without ever being reviewed. When the author says "The founders had ideas of their top priorities and worked with the relevant teams on those, but the list of the top company OKRs was a subset of all the OKRs, not a roll-up. Some people were not working on anything the company cared about strategically!" referring to Google, that sounds very aligned with you saying "There's company-wide and division-wide OKRs that get major events to publicize them, with large Q&As and all. It's easy to learn what the priorities are and why. But, usually you just pay attention to what your local group is working on."