They not "changing" anything they are just applying it all on cryptocurrencies. Maybe last 3 or 4 years ago we have seen the crypto industry not have some kind of requirements from the exchanges and a lot of exchanges don't require KYC but now you will barely see that as the government is moderately applying all of their requirements to the crypto industry. From KYCs, Tax reports, and other documentation all of these are being required by stock brokers, forex, and banks so I don't think we can say that it is "changing" when everything is just being applied to us.
Perhaps the keyword is adopting, there are no changes at all, just financial regulatory applying KYC as mandatory now due to AML, in which the banks did comply years ago. And since crypto industry has been growing in the last 4-5 years, this financial watchdogs are adopting this as well to crypto exchanges. And that's why I said that exchanges are slowly turning into traditional banks.