Sun made a bunch of serious mistakes in 2002 before Jonathan that it never fully...

Sun made a bunch of serious mistakes in 2002 before Jonathan that it never fully recovered from:

  - not making a deal with Google
  
  - the [temporary] cancellation
    (suspension) of Solaris 8 on x86
  
  - the closing of Sun professional
    Services

These three mistakes were ultimately the ones that ended Sun, but there were many many other horrible mistakes along the way, like:

  - sitting on its laurels and doing
    vendor lock-in monetization of
     - J2ME
     - SPARC
     - Sun Directory Service
  
  - not building an Active Directory
    clone
  
  - spending $1bn on MySQL (wtf)
  
  - ...

Then Oracle overreacted to the Greenbytes' shipping of ZFS dedup before Oracle and killed OpenSolaris when OpenSolaris was the only hope for Solaris itself. And now Solaris is a tiny operation.