Hopefully you’ve read my thoughts on the 2018 BMW M550i xDrive I recently spent a week with. If not, you should. Hopefully you’ve also read the opinions of our fearless editor, Robert Moore, on whether the new 2018 BMW M5 is a waste of money compared to the M550i. If not, again, you should. But having spent time with BMW’s slightly less M-ified 5 Series, I wanted to chime in on the topic. Buckle your seatbelts, you might not like my answer.