I typically don't go on about this, and I suspect it's dismissed by most, but ...
It's amazing (and amazingly satisfying) how much of this debate one can simply ignore when one uses ssh to log into an account and run pine (or elm).
A lot of this just becomes irrelevant.
Did you know that not one intercompany email at rsync.net has ever traversed any network ? It's just a local copy operation ... and no browser has ever touched them.