As casinos move to increasingly decentralized principles of operation, KYC will gradually disappear. And I have no doubt that the principles of decentralization will inevitably be applied in every casino over time. Over time, only casinos without KYC will be able to survive. But this is a fiat issue. Where there is fiat, there will always be KYC. Therefore, in my opinion, all casinos should gradually adopt the rules for working with cryptocurrency. In addition, sometimes the KYC plays a discriminatory role in relation to the user. In other words, some casinos require the user to go through a registration test in order not to pay him the winnings. This is a harsh reality in many countries.
I also thought about it, with time, only non-KYC casinos would be mostly adopted by gamblers, but on a second thought, I feel that the already-existing KYC casinos have thousands to millions of customers who have already passed their KYC and will love to stick to their favorite casinos. Just those new arising casinos may want to deviate from their KYC, and they will also win some new customers who probably have not just stuck to their already selected casinos. For example, I have done my KYC at Stake Casino and some other casinos, so even if there's a new casino that doesn't request KYC, I don't have any reason to bet there unless they have an exceptional service that my favorite casino is not offering.