If the discussion is on the usefulness of vc-region-history, then it has
been very useful for me.

Coincidentally, just yesterday, I bound that command to "C-x v H" in my
config, after I realized that I had been doing M-x vc-region-history for a
few dozen times.

I always wondered why this command was not bound to the "C-x v" map, and
have also created a little patch for master branch to add that binding.

On Sat, Jul 9, 2016, 3:04 AM Eli Zaretskii <eliz@gnu.org> wrote:

> That's very far from my experience.  I frequently need to investigate
> fragments of code which have very long histories, and "log -L" always
> gives me the full picture, even when the code in question changed
> significantly, right to the commit that first introduced the code.
>
> Perhaps the secret is in choosing the appropriate region.  I normally
> try to submit the entire function where the code lives, and it works
> very well.
>
-- 

-- 
Kaushal Modi