CZ proposed this I think two weeks ago, but my advise to people is that they should not hold any coins on an exchange except the money they are actively using to trade.
The best place to hold your coins are on cold noncustodial wallet that are open source.
People should learn about multisig, timelock and other inheritance means.
The most preferred way but I do believe that there would be those people who would be making use of this feature because they dont want to hassle themselves on keeping out their keys but instead they would be that trying out to put up their coins into the exchange and trying to make use of this one and be contented and confident that once they do passed away then their family would be that told into, but here are the possible situtation could happen before you do possibly passed away unexpectedly:
1. Exchange hacks before you die.

2. Binance would be just that simply keep silent after you die, since your family doesnt know about your holdings then they can opt in not to give it into your family.
3. Setting up a will and wallet lock on a custodial service is a big NO-NO.
Nothing beats out if you are the ones who had been holding your coins into your own open source, non custodial wallet and having that full control.
Setting up things in regarding about inheritance isnt that hard to follow after all.