Which succesful software publisher/develper could fall from grace?

[Ail]

TheRealMafoo said:

Microsoft.

Apple is gaining on their OS market by HUGE numbers. If the trend continues along the path it is, in 5 years there will be more OSX users then Windows users.

I don't know how well MS can support themselves if OS sales decline in those numbers.

Are there really that many business outside of the publishing industry running OSX now ?

I see some buying apple hardware here and there but they run Windows on it..