Why is `scope` planned for deprecation?

[via Digitalmars-d]

On Monday, 17 November 2014 at 01:39:38 UTC, Walter Bright wrote:
> Notice the total lack of strlen()'s in Warp.

Why would you need that? You know where the lexeme begins and 
ends? If we are talking about old architectures you have to 
acknowledge that storage was premium and that the major cost was 
getting the strings into memory in the first place.

>> Nah, if you know that the file ends with zero then you can 
>> build an efficient
>> finite automata as a classifier.
>
> deadalnix busted that myth a while back with benchmarks.

I haven't seen it, but it is difficult to avoid lexers being 
bandwidth limited these days.

Besides, how do you actually implement a lexer without 
constructing a FA one way or the other?