Yeah, yeah... right. All those companies and large organizations using Plone must be crazy I guess.

Can you at least elaborate on your terrible experience with Plone?

Maybe there are situations where the TCO for Windows is lower but, having said that, I can't remember any. Even including all the costs for migration and user training, etc, etc.

Unless you exclude license fees, it would need some imagination to find Linux costs greater.

Being able to keep your system up-to-date without maintenance fees is a BIG plus.

I would say being able to keep your system up-to-date without license fees is a BIG plus. Every system needs maintenance. With FOSS you may be able to perform maintenance yourself, but large and complex systems should be maintained by specialized providers.

is fairly easy to brick a Plone website by "accidentally" deleting the wrong files

Well, try deleting MySQL DB files from a Drupal site and see what happens...

On the other side, Plone has some handy features that minimize those accidents, like incremental backups and mostly ZODB versioning, allowing you to undo previous transactions.

Agreed. 45% of 17% is not that much. Portugal is still buying 83% of its energy. It is not realistic to say that Portugal will close 2 power plants by 2014. OTOH, this renewable energy program is highly subsidized, and so it's not fully proved in real market competition. Although I agree this program goes in the right direction, it is too soon to do an evaluation of its sustainability.