It's a very noble goal, and a pity HN has only one upvote per reader :-) But, designing a ship that 10 years post-release can fly and dig under ground on a whi

It's a very noble goal, and a pity HN has only one upvote per reader :-) But, designing a ship that 10 years post-release can fly and dig under ground on a whim is a pretty high bar - and would be interesting to learn of successes elsewhere, if you know. Some of the "weird" IPv6 knobs today are actually very useful, though from what I know, I must've been one of the first known instances to abuse some of the non-defaults at a 10K+ users' scale. So, I'd say - keep "no knobs" as a goal, but still leave the dirty knobs somewhere to turn in case of emergency. You'd be thanked, if by accident your protocol get used 15 years later :-)