Totally agree. I think you can argue either way as to whether 6-bolt or CL is inherently better but the facts are that CL is now the standard.
Just think it’s helpful for the OP (& others) to understand why it’s the standard and that it isn’t necessarily technologically superior to 6-bolt. I get your point re:Zipp et al. but in this case given it’s dominance of the OE groupset market, Shimano has enough clout to define standards like this.
FWIW, I absolutely do not miss the pain of having to unscrew & then refit 12 bolts every time I travel with my bike…
Have you used adaptors for 6 bolt to centerlock? I think this solves the bolt head issue but also gives the simplicity of ease of finding rotors anywhere as well as the cost saving from 6 bolt vrs centerlock,
I’ve seen these adapters, but they all seem to be for centerlock to 6 bolt. Are you saying there is a 6 bolt to centerlock adapter as well? If so, do you have a link to them?
I currently have a 6-bolt setup but would like the option to run centerlock if possible, but haven’t seen that type of adapter available.
While we are on the subject of rotors, let me ask another question, this time concerning size. Keeping in mind that this is for a TT/tri bike (and I weight 147 lbs / 67 kg), I suppose that the argument in favor of 140mm is weight savings and in favor of 160mm is better heat dissipation. Is there anything else to consider?