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Someone will get privacy coins on a DEX and change the whole game.

Not doing it asap is just delaying the inevitable.

Rip off that bandaid ;)

If its decentralised, why would rune struggle to add privacy coins?

Maybe you answered your own question here...

Not decentralised enough?

Yes very true

Spectrum of decentralization and #rune isn't far down the decentralization spectrum

This is a bit of a concern... The point is that most projects are still too often the recognizable work of too few individuals.