What does the -betterC switch in dmd do?

[Meta via Digitalmars-d-learn]

On Sunday, 15 November 2015 at 15:34:19 UTC, Jacob Carlborg wrote:
> I'm pretty sure that the only things that are excluded are 
> module info and type info. It's still possible to use "new" and 
> all the array features that requires support in the runtime 
> (slicing, concatenation, appending and so on).

Don't those features require type info?