Re: license discounts
"One of my DBA's came across a new feature called RAC many years ago and nearly turned it on. Its a fantastic product"
You had a lucky escape there! RAC is complete and utter pants.
The only thing RAC gives you is the assurance (OK - vague possibility) that one half your RAC database will stay up if the other RAC node crashes.
And the most common cause of RAC node crashes? RAC itself! 99 times out of 100. In fact after 20 years on RAC sites - I have never seen a RAC node go down for anything other than a RAC induced issue.
It only ever made sense if you could not get enough iron to run single instance. Which was only ever likely 20 years ago.
Like I said - a luck escape.