From etags to ctags?

[Danil Orlov]

Emacs now support only etags format directly. But this format does not support 
storage of extended information about symbols, like scoping and inheritance 
data. But Exuberant Ctags can gather such data.

And if such information will be presented in tags, it will be possible make 
smarter completion for company-mode and auto-complete-mode. Without creating a 
parser in elisp, like in js2-mode. 

How do you think, does it make sense to create direct support of ctags format, 
like it done for etags now?