That "alone" is another very important consideration as well, which until now hasn't been mentioned. Especially for people who, between spouses, children, pets, cell phones, email, work and social obligations never would otherwise have a moment's peace, the commute - where all communication with the outside world is - or should be - verbotten - might very well be the last bastion of undisturbed, personal private time - and not by any means something with which to be trifled lightly.
Some of us would DIE if we had to go directly from the demands of work to the demands of home without that interlude of freedom during which to unwind.
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