If records are not sequences, why does aref work on records?

[Paul Eggert]

On 04/07/2017 12:40 AM, Lars Brinkhoff wrote:
> I think there are only a few functions that wants a sequence but not a
> record: elt, copy-sequence, concat, reverse, and sort.

It is confusing that aref works on records but copy-sequence etc. do 
not. This behavior of aref is not documented in the aref doc string, or 
in the Lisp manual under aref.

How about if we define a new function record-ref to be used on records, 
instead of aref? At the low level this would insulate records better 
from the rest of Emacs Lisp, which I think is the intent -- as I 
understand it, records are supposed to be used to create new types, and 
are not supposed to be sorts of aliases for sequences.