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.
I agree, and if this became a prominent thing then large balance wallets would be constantly attacked and hacked, which would reduce customer confidence unless much higher security is put in place. It's a brave new world, but the risks are higher.