Yep! Makes sense. Though I think the cost of writing these toolboxes is lim --> 0.

Will have a really solid rust inspired package manager soon, and a single #macro to expose a rust function in the RunMat script's namespace (= easy to bring any aspects of the rust ecosystem to RunMat).

I wouldn't be so sure that writing those toolboxes is cheap. You need an aerospace engineer to write the aero toolbox, or you are going to miss subtleties. I assume you need a biologist to write the biology toolboxes. All of these domain experts are really expensive, and I would not trust a toolbox that hadn't been review by them.