I understand your point of view, although there are people I know who managed to run Web Audio API plugins as VSTs :)

This particular app is meant more as a playground / sketch / sharing tool for DSP techniques, and imho it makes sense for it to be on the most immediately accessible platform, the Web.

However, it's possible to add Faust or C support to it in the future (using WebAssembly), a feature which will allow exporting your snippets directly to executable / VST.