Another win that you get is roaming: if your local IP keeps changing, perhaps because your bus's cell modem keeps dropping out, then you don't lose your SSH ses

Another win that you get is roaming: if your local IP keeps changing, perhaps because your bus's cell modem keeps dropping out, then you don't lose your SSH sessions As a random aside, mosh (http://mosh.mit.edu/ http://mosh.mit.edu/) is incredibly good at IP mobility. One of my favorite examples: I circumnavigated the globe in November of 2012, and used the same mosh session in San Francisco, Hong Kong, Singapore, Kuala Lumpur, Penang, Bangkok, and Istanbul. :-) mosh also provides predictive local echo, which has made working over high-latency links so much more pleasant.