1mb is just data..
if there was only the 1mb limit. then quadratics could make a single tx of hundred thousand sigops taking HOURS to validate..
Op codes are data. You can only fit so many spammy op codes into a block. You cannot attack a 1MB block even if it was completely full of the spammiest OP codes. Sigop's limits are a new thing, we didn't have them before.
all sgwit key users are doing is disarming themselves from performing it. but people sticking with native keys can still perform it.
*sigh*
On their 1MB BLOCK, which cannot be used to craft a quadratically spammy tx that takes 10 minutes to validate. Sure, native key users can fill a block. They don't need quadratics to do that. Segwit keys can fill a block too. Anyone can fill a block if you got enough money to burn in tx fees and outbid everyone else.