So there's already a name change history on each persons forums profile (if you've change your forums name). There should be a history of profile pics.

 

The question is why?

There's no purpose for this; and that would be a lot of pictures.

 

Eh, neutral;

It'd be pretty cool to have, but people change theirs everyday, and idk.
It'd be cool

 

Support it would be cool

 

No, the question is not "why". It's "why not"

 

sure

 

Neutral

 

Neutral

 

No support.
People usually change their profile pictures much more often than their name. The reason that previous names are useful is so that you can identify someone that you may have recognized before their name change.

 

No support.

 

No support.

 

How would this be beneficial to anyone?

 

Neutral,
it's cool but not really necessary.

 

There's no Xenforo plug-in for this nor would it be useful, it'd be fun to use, yes, but not very useful.