Why is `scope` planned for deprecation?

[via Digitalmars-d]

On Sunday, 16 November 2014 at 21:54:40 UTC, Walter Bright wrote:
> Besides, C was designed for the PDP-11, which had no such 
> instructions.

BTW, this is not entirely correct. It had autoincrement on 
registers. This is the example given on Wikipedia:

  MOV #MSG,R1
1$: MOVB (R1)+,R0
  BEQ DONE
  .TTYOUT
  BR 1$
  .EXIT

MSG: .ASCIZ /Hello, world!/

The full example:

http://en.wikipedia.org/wiki/MACRO-11

So the print loop is 4 instructions (I assume .TTYOUT is a I/O 
instruction), with a length you would at least have 5 
instructions and use an extra register, as you would have an 
additional compare.

(As for concat, that I almost never use. In systems programming 
you mostly append to buffers and flush when the buffer is full. 
Don't need length for that. Even in javascript and python I avoid 
regular concat due to the inefficency of concat versus a buffered 
join.)