Here's a draft article I've had laying around for a while.
I haven't published it anywhere yet because:

1.  I got busy and forgot about it until some other current threads made me think of it.
2.  It mentions many other chains and that always generates controversy.
3.  I've been saving it for just the right occasion, perhaps my retirement from the industry in 2037.

So, at the obvious risk of upstaging myself if and when I actually do publish it somewhere, I'll preview it here (just among friends) so you can:

1.  Use it to stimulate the discussions going on in the other threads here and here.
2.  Tell me where I've missed the mark or have risked offending some other community.
3.  Suggest where I might best be published - if anywhere.  (Newsletter, Blog Article, Inner city graffiti wall...?)

Stay tuned, it will take me a minute or two to format it for this venue...