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Basically the limit (ie. the standard rule) greatly and successfully reduced the amount of abuse.
Because its not an attack, just like Counterparty wasn't an attack. You are mired in confusion because you continue to mislabel it as an attack. Once you accept its not an attack, then the situation may begin to make more sense.
Do you honestly not understand the difference between 80 byte limit and no limit at all (except 4 MB block weight) or are you intentionally ignoring this fundamental difference?
Due to the nature of economic incentives and capitalism, this will never happen.
Then you are saying that Bitcoin, the "peer-to-peer digital cash" as Satoshi put it, has already failed.