Which platform do we think is more reputable and have good track record of security? Does either of them have good liquidity?
You'd have to move the thread to altcoin discussion. Should be more appropriate given that it's about DEX.
Not true. You have always been able to trade Bitcoin using a DEX... Uniswap and all them altcoin-swapping platforms don't lay claim to being the first DEXes around, you know. They may have popularised liquidity pool style AMMs but certainly weren't the first, nor the only ones.
They're not even half as decentralised as p2p exchanges like Bisq. Non-custodial is probably the only aspect most DEXes can claim accurately.