Lots of good thoughts in this thread, just one thing I haven’t seen mentioned that I figured I’d call out
I don’t know if TT bikes will be going in this direction in the next year or two, but I am surprised that the high end TT bikes aren’t yet all up against the current UCI weight limits. I think there is a (slight) gain to be made by getting down to the weight limit, particularly for these WT TTs that have riders considering a bike swap