It's possible that we arrive at a situation where any entity tied into the legacy financial system will not accept non-KYC Bitcoin.
Discussion
100% as it will same in cashless /cbdc countries.
nonkyc-BTC will be used like physical gold swap in places where possible for small or large deals
salvador's offical wallet chevo doesnot all cojoined/mixed BTC inbound for example
korea doesnot allow anyone to send/spend btc worth more $600 maybe per year legally without kyc