I have Binance, OKX, Huobi Global and Kucoin account. KYC is mandatory on Binance as we all know. I was unable to access Huobi derivative trading until I submitted KYC. OKX forced me to provide a mobile number when I wanted to withdraw, but that is still cool because that can still be done in a way it will not link to my real identity. I do not know much yet about Kucoin because I opened it two weeks ago, maybe the exchange will still make something pertaining to KYC mandatory or not, only email and password was required for sign up just like login in, it is the most recognized among those no KYC centralized exchanges.
I have to say KYC is not a trouble if you are dealing with exchanges because maybe you and I may not have millions in there, but the overall funds are in billions there, which means they are asking for KYC not for just legal reasons but because they would like to protect you as well.
If something goes wrong then they may ask for your KYC and request it again, this way you will be able to provide it again because you are still you, whereas someone else can't provide it because they are not you. This is why it's good, I had this back in the day in around 2017 I think, or maybe 2018 where someone tried to hack into my account and they were asked for a photo ID with current date, and they couldn't of course so they failed.