[plt-scheme] xxx chooses MzScheme as preferred language

> One project we have is creating a new database engine, and MzScheme is not
> even on the radar as a possible implementation language. We are already at
> the limits of hardware, and taking a 10x-100x hit on performance is just
> not available to us. And there are a large number of projects in similar
> positions. As an extreme example, when some groups need to embed the web
> server in the kernel to avoid context switches because of overhead, you
> know you are dealing on the edge of performance requirements.
>   
Just run it on multiple systems and put some hardware load balancers 
before it.

--Hans