And the potential improvements in technique that come from even relatively short long-hauls (by Excalibur standards)...I put to you that life is too short to miss out on the smoother shaves found after the second use.
I don't imagine many will be able to take a blade to 20+ and tell me they haven't learned anything at all from the experience...
Having said that - I can respect people who have gotten 20+ from a blade or two and decided they prefer shave 1/2/3 and don't want to go the extra mile regularly... I just think anyone that hasn't tried it is missing out.
(And I say 20 only because that's as far as I've personally gone... Intending to go further in future for sure - but perhaps not this month!!)