luke-jr told me it takes 2 bytes per tx and 1 byte per vin extra using segwit as opposed to a 2MB hardfork. I thought you also confirmed this. Now you are saying that using segwit reduces the total permanent space used by 30%, if that is really the case then I will change my view.
please explain to me how lukejr is wrong when he says it takes 2 bytes per tx and 1 byte per vin. i will update the title to match my understanding, without shame when I see my mistake. Imagine I am like rainman. I just care about the numbers
Where did luke-jr tell you this? Did he explain why? I don't understand the 1 byte per vin part and would like to see the explanation for it.
What gmaxwell is saying is that segwit allows for future upgrades. One of those future upgrades could be an upgrade to a different signature scheme which does have the 30% reduction.