That would be great, but i think we're beyond that now. It is what it is. Bitcoin will be so valuable that even if the tradfi doesn't want your tainted bitcoin it will still be valuable due to everyone trying to exit the fiat ponzi. There will always be a black market for it.
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But that still doent make it fungible. You just think tainted bitcoins will be accepted regardless becuase of their value.
Time will tell i guess.
I think bitcoin is too far along for any successful fork to happen. In my mind, so many of us exit the system that it won't really matter. I don't care about the history of my coin and I'm sure I'm not alone. It's the nation states that play these games and they will become less relevant to those who recognize their false authority.
I agree, fungibility is ideal. But i think bitcoin is too far along for major changes in regards to that. We have to work with what we have