I think you have to have sub groups of bikes
Let’s start big off road ,- road- then those in between
If you didn’t have these groups how could you go into a shop and describe what you want?
How would you know what the designer intended his bike to do
26 bikes have xc trail am dh whatever yet some of you lump all 29ers under one group a yelli screamy is not the same as a tall boy or a ragley td1 they were all intended by their designers to perform in different ways
Didn’t someone once say writing about music is like dancing about architecture , let’s stop the dancing and do more riding