footguns

It's usually undesirable to add a default scope. It will take more effort to work around and will cause more headaches. If you know you need a default scope, it's easy to add yourself .

maybe this just comes down to general footguns with reactivity, and being aware of them as a developer.

There is always a way to work around that by doing expr as unknown as T, but it stops people making basic errors.

I'm personally surprised about that, given the degree to which web component advocates prioritise encapsulation — it seems like a footgun, honestly