SegWit is not Bitcoin. SegWit is an altcoin.
SegWit isn't altcoin too
check out my post above.. where gmaxwell calls anything not segwit an altcoin. yet its segwit that is currently not activated on the mainnet.. yet other implementations he wants to fight against. including old bitcoin nodes are altcoins in his mind.
screw it here you go, saves you scrolling
If there is some reason when the users of Bitcoin would rather have it activate at 90% (e.g. lets just imagine some altcoin publicly raised money to block an important improvement to Bitcoin) then even with the 95% rule the network could choose to activate it at 90% just by orphaning the blocks of the non-supporters until 95%+ of the remaining blocks signaled activation.
yes he wants to call bitcoin0.8-bitcoin0.12 nodes an altcoin if a pools wanted to stick to those old nodes and refuse to upgrade to bitcoin0.13 just to flag desire for. and refuse to wait for the actual segwit node 0.14 that will only be released after activation.
funny part is an altcoin is something thats not actively running on the network..
in short.. how can something not on the network affect the network its not on.
EG how can ltc block an important bitcoin improvement on the bitcoin network.. it cant.
only an active bitcoin node on the network can be able to block something different from getting onto the network. meaning the blocker is bitcoin and the blockee is the alt