Synchronizing

It is a longstanding problem of how to really synchronize mail folder, schedules etc. between home and mobile computers. Again, I can't remember who observed that originally. But the problem is about to dissolve instead of being solved, simply by being always online and no longer needing multiple replicas of one's data.

Now, a similar thing has happened before: There has been tremendous effort to make precise clocks as these were needed to get exact coordinates in ship navigation. You were on sea for months and did not want more than a minute of error. Then radio came and soon allowed worldwide transmission, and the need for mobile precision clocks disappeared.