Comment by AdrianB1

I saw this in many places, so I read that original statement like a complaint about a widespread problem, not an exception in one company.

Sometimes is not even about a PR, it is about an entire project. I always do reviews (design and code, separate stages) for projects where code is almost complete when people come for design reviews and by the time we get to code reviews it is usually too late to fix problems other than showstoppers. I worked in small companies, huge companies (over 100k employees), some are better, most are bad, in my experience. YMMV, of course.