As to apple. I've always wondered if the magic there will continue after Steve Jobs dies.
Apple did just fine while Jobs was on medical leave for six months or so.
Apple's secret to ongoing growth and success is introducing a major new product category every few years. Six months takes nothing out of that--the long term visionary work Steve Jobs does can be missed for six months without much impact. Six years and Apple would be in decline.
Now I'm currently refering to facebook failing in the same way that "Microsoft and Yahoo" have failed. They still exist, are still (quite) profitable, but their relavency is fading.
As to apple. I've always wondered if the magic there will continue after Steve Jobs dies.