you being known to the authorities because of the KYC done by exchanges means you are vulnerable to them and they could visit your home address and chain you for having transactions they couldn't trace. that's crazy but it could actually happen.

developers also may be visited by the authorities to see whether they can tag wallet addresses. and this is how blockchains of some coins may not survive. if it's what OP means? if they could do this to mixers why not to the developers? they could just find faults in these developers and if they are resistant, they could just jail them.