Will take years to get there, if they even get there at all. This is a single-man side project now. Also benchmarking something that has 1/100 of the original functionality and is not production ready is very unfair. It is much easier to get a specialized use case faster than a general purpose system.
He is not the first, Andy Grove worked on a similar thing last years, but he worked mostly alone, and without community you cannot take off such ambitious project: https://andygrove.io/2018/11/datafusion-2019/