It's not the best idea, it's the last "good" idea used.
For example, Google may not be the last search engine, nor may it be the best search engine, but for the average person in the US, it's the last "good" search engine they have used.
For example, Google may not be the last search engine, nor may it be the best search engine, but for the average person in the US, it's the last "good" search engine they have used.
The article is about the importance of creating a culture where the best ideas are adopted, regardless of who/where they came from.