I don't know about the others, but DEX is enough for me - and I really like it. Why?
On regular exchanges you don't have the keys, so you don't really own any money there.
On DEX, I trade directly from my personal wallet, so whatever happens to any DEX, my money will definitely be safe.
Dex tends to be more comfortable and secure than storing our assets on regular exchanges. Even though I still do transactions on Binance or Indodax, I prefer Uniswap, no KYC and control is in our hands.