Hacks will still occur. As there's a shift to a more enhanced level of security, the hackers are also advancing their skills to bypass the security shift and as such I wish to say that even if there's an exchange functioning like Uniswap and Atomic swap, they will always be hacks on individual wallets. Everyone should learn to stay safe.
Hackers will always find a way to hack people's account even how we tHink how secured the exchange is.
It's a good idea but there are also possible breach like when its transferring to other wallet how exchange can secured that no one Wil be hacked the moment they transfer the funds and exchange to other currency. Many trials needed before launching it to public if someone plan to create that kind of exchange.