Spam tx's are by definition economic transactions someone finds inappropriate, and individual judgments calls are not part of the protocol, that's bitcoin
Miners can choose what to include in the blocks they build.
anyway to say 6 years after bitcoin has grown that storing transactions and blocks for ever should change is not keeping with the idea that is Bitcoin.
OK. I'm not sure anyone suggested otherwise.
Maybe I misread the tone of your concern about storing spam forever.
I agree miners can choose what to include, this is important and must not be manipulated by the protocol, the market for fees must be free of manipulation to be successful, it will always be free so long as new market participants are aloud to compete, and the number of transactions are not artificially limited.