[RFC] Slots, lazy and accessors in JS

[iwoplaza]

Currently, slots throw when called from JS. We'd like to lift that restriction, we talk about the exact mechanism after App.js

Should accessors be accessible in "normal" mode?

There are cases where the contents of an accessor are accessible in normal mode (they aren't tied to a GPU resource like a buffer). The simplest cases are literals (.with(fooAccess, 15)) and constants (.with(fooAccess, foo)), the gray area are functions. Do we call them in JS?

In cases where accessors aren't accessible in JS, should we error the user using the accessor in JS, or should we error when providing a value that isn't accessible in JS.