Lots of thought and introspective. For the geek there are plenty of details on geometry (rake, trail, bottom bracket height) and how this affects the ride of the bike. I really liked the idea of putting 650b wheels on a CX bike to gain extra tire width and volume while also dropping the BB height for more stability.
One comment in Part 1 which really struck a chord with me: "... when considering a whole gravel bike it’s key to consider the core aspects that comprise the ‘essence’ of the bike: the frame and fork. Everything else is interchangeable, and should be considered secondary when assessing complete bike options."