I was surprised by this list, I was worried that there would be no safe exchange to save crypto assets.
It should be a concern that security is important and users must get a guarantee. I like binance with their guarantee after the Hack case (SAFU).
Hopefully other exchangers will do the same thing with what Binance Exchange does by insuring their exchangers so that if something goes wrong, someone can be responsible for the funds of investors and traders.
I am agree with your viewpoint to insuring their Cryptocurrency Exchange Software like Binance for getting ready for any bad happening in future. It will also keeps the trust of the traders and investors at your respective exchanges. Unless user will move to much safer exchanges which will not be good sign for you..