Please refer to http://pic.dhe.ibm.com/infocenter/clmhelp/v3r0m1/index.jsp?topic=%2Fcom.ibm.help.common.jazz.calm.doc%2Ftopics%2Fr_calm_cfg_roadmap.html which talks about RTC's backward compatibility.
Dashboards and work items are no longer publicly available, so some links may be invalid. We now provide similar information through other means.
Learn more here.