Better intellisense support?

Hey folks! I was wondering if it would be possible for the intellisense menu to show more info in the pop-up, perhaps enabling jsdoc comments from the source function to be shown. That way we can put comment docs above our functions and the intellisense window can show those comments for info on parameters, etc.

Is something like that possible, or is there any other way we can improve the intellisense?

Somewhat related: Compiled code drops leading/following comments ยท Issue #359 ยท observablehq/feedback ยท GitHub

This proposal would be ideal for Observable A Proposal For Type Syntax in JavaScript - TypeScript