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I don't understand why you say 'you can not much such a change and exclude anyone'. It certainly could be implemented. Whether it is a good idea is a different question.

If you do make an exclusion, would you make it optional, and if so, what is the difference? if not then you are doing one of two things, changing the contract without allowing anyone to disagree and leave " Lower inflation, no option to liquidate under two years " , at the same time giving people who join the contract now an easier way out if they do not like the experiment. The massive increase of supply is already there on the marketcap whether it's locked or not. Exclusion in this case equates to changing the constitution for some and not all.

I don't think it would be fair to exclude pre-existing SP after changing all the other terms of the contract, I'm just pointing out that it would technically be possible.

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