Thanks for that, makes sense.
But you are not saying that all bearings on a bike will easily last 100.000 miles are you?
In this sense -unless you buy the highest grade/intense quality/hyper expensive headset, pedas, BB and hubs it does seem to make a lot of sense to add a real cheap fitting and then be able to extend the life of cheap but servicable components 5 tot 30 times, especially as the greasing seems to be a very small job.
What do you think?