You need to add a lot more generic icons that are not tied to specific cloud providers. I found it very difficult to map out a system I built in a datacenter.
Sure - what extactly would you be looking for? There's also a section in Arcentry labelled "Generic & Customizable Components" which has 56 generic servers, databases, PCs and basics like cubes and triangles.
I think you should share this prominently on your website, showing how you can do more than just cloud.
There are a lot of infrastructure segments that could benefit from your product even beyond the industrial setting. Traffic? Production lines? More!