Apologies if this has come up before; I'm unable to find any related issues.

It would be cool to be able to publish extensions in a beta form (similar to Code Insiders) so that they can be run "in production" with real users that have opted-in. This would reduce the disk in publishing an extension because you can push it to a smaller number of users for testing (I probably don't need to sell this to you, I guess you have Insiders for very similar reasons).

I know we can package and distribute extensions ourselves for now, but it's not as easy (eg. updating is not automatic).

I originally thought the "Preview" flag might've provided this functionality but unless I've overlooked something, it does not seem to.