Coss developers have been keeping up the promises with the updates any everthing, but minor delays. Big Update with engine and UI coming Q1.
t.me/myCOSS
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Long term if user adoption is achieved COSS will be huge. This is the most important thing.
UI will push the mass adoption, but then it just begins. KuCoin is doing really well. Really strong support and lightning fast listings of coins.
Hopefully COSS will do it even better.
I think exchanges like this are the future. Sharing the fees is a really nice incentive. COSS is even more generous with its static 50%.