Excitement among tech startup people is a lot higher than the regular people out there who might use their products. I think they're overestimating how many crypto users there are right now. Netagio was another that closed due to lack of interest from actual customers.
Exchanges must be a bitch to run and make money from. Only a small hard core would use it multiple times a week. The rest might make one trade on occasion and that's only a fraction of a per cent for the owners. You gotta spend vast amounts on security and pleasing The Man let alone gain the trust of your customers.
It would be a worry if an established exchange shut down for lack of interest. This is another example of VC money going up in smoke without having gained traction.