Re: I dunno what's so hard to understand about it.

[federico3]

I support a smoother deprecation process, like the one Araq suggested, because 
the abrupt change in #12321 creates conditions where csize has different 
meaning in Nim 1.0.0 and the next release, making it difficult to maintain 
backward compatibility in libraries. Also, the deprecation process provides a 
friendly warning to developers instead of introducing a sudden breaking change.