Yes, Don's situation is eerily similar to what many of us have experienced. I have sadly come to the conclusion over time that all computer work takes at least 2 1/2 times the quoted estimate. Luckily, my most recent grinding sound was only my 2007 Dell laptop hard drive, so I did not have all the associated learning with Windows 7, etc., but I imagine I have merely delayed the inevitable.
The most poignant part of what I read was the age of Don's computer, a retirement gift to himself. It hardly seems possible that it has been so long.... And I know I, like so many of you, still sorely miss the wonderful harmony, humor, and stage presence we all have treasured for so long.