No need to pursue this, I don't actually have a need for this functionality right now AFAIK. Any code that got close to the limits can be minified to frustrate everyone, or should be in its own plugin file probably.
I’ll hold off on it unless someone else asks, then.
I think larger Scripts in Events would be fine if combined with a function cache, but getting that just right in a way that breaks nothing (some plugins edit Command lists at runtime and eval can read surrounding variables so I’d have to detect that) is definitely too complicated for a sketch plugin.