Justin O'Beirne's articles are extremely detailed as always. It's definitely a must-see for mappers whatever the company or products you're working with.
This was one of the best blog posts I've read in a very long time, such detail and precision.
He seems to be gently trolling his former employer, too.
But he is consistent since 2010 in his point of view and analysis process. Getting even more precise, so or course it might have trolled a little bit but his arguments make a truly interesting whole.
I think it's less trolling and more pushing them to do better.