Was thinking some more about this... basically the issue with Komodo is that both parties need to be ready to make a specific for it to occur. However, in practice, buys and sells need to be able to hang in the exchange platform for some days or weeks before a counterparty is found and the trade is executed. This can be done in a DEX manner if the blockchain has tokens and smart contracts, like Ethereum, but it still wouldn't be able to handle coins whose transaction rules are outside of its environment. The only way to send Dogecoin from any platform is by using the actual key for it. Hmm.
I don't see Komodo being used much and DEXs now seem to have mostly Ethereum token trades but not the main cryptos.
https://np.reddit.com/r/Monero/comments/i1fknt/ccs_results_monero_atomic_swaps_research/Still more theoretical discussion about how swaps should work, it doesn't seem to have been solved yet properly.
I was thinking about interfacing with regular exchanges for now to get coins for withdrawal or to provide liquidity for certain pairs. Of course a better DEX solution would be more optimal though.
Let me know what kind of DEX you are thinking about, if there are any examples in particular.
I thought DEX as BlockNet, or Komodo's AtomicDex. there is also that of the blockchain of Burst but I don't know how it is.