The maximum number of Web Parts for all zones on this page has been exceeded

Error: The maximum number of Web Parts for all zones on this page has been exceeded

I came across this message today when I was working on a page that has more than 50 web parts on it.

Later after a bit of research I learnt that

• The limit is customizable in web.config file,
• 50 (default) - http://technet.microsoft.com/en-us/library/cc262787.aspx
• 100 (recommended max) - http://technet.microsoft.com/en-us/library/cc287743.aspx

 However, no documentation  has been found about

• The maximum number of web parts per web part zone
• The maximum number of web part zones per page