Just realised a presentation that Andrew Stephens and myself did for an IBM Cognos User Group is available for download from the IBM website.
In what will always be a controversial list we called out at the time the Rule function Continue as being a real game changer for TM1 developers.
Those who have been doing TM1 for 10+ years since the days of TM1 714SR2 will remember when there was no Continue function and constant nested Ifs made for ugly looking rule files.
Check it out here:
http://public.dhe.ibm.com/software/au/downloads/Top_20_Developments_in_IBM_TM1_in_recent_years.pdf