Many many demo gifs or videos for as many use cases you can imagine right in your home page. Preferably these demos should progress from the simplest use cases to more complex ones.
Show me the code snippet of the hairiest aggregation.
Show me what needs to be done on the terminal, what needs to be done on the IDE, what needs to be done on the browser etc.
Finally good realistic benchmarks. Several gigabytes of data that all start on an SSD (not nvme) then finally output aggregations and time taken to do so.
If you've been intellectually honest in your demos and your product is good for my use case, no reason I wouldn't try it.