I'm not particularly concerned with what is prevalent and what is not. Designs in this industry are constantly changing, as they are with just about everywhere else. The diversity of it is what intrigues me. I have three "racing" bikes. A Colnago C60 with 2015+ Record 11 speed mechanical, a 2013 Master with a mix of 2005 and 2008 Record 10 speed and a 92' Marinoni with 93' Record 8 speed. They are all very different bikes, and I enjoy riding all of them and I enjoy equally as much working on each one of them, and their mechanical differences. Some of the tools can be used on all of them, some tools are specific to one or the other. What ever. I'm fine with it all.