. What are the main differences in features between Sage Accounting, Sage 50, and Sage 300? 2) What is the Sage City resource which is made available on that page? 3) If someone wants to change from one package to another, will it be possible to do so? 4).What development is happening on Dec. 31, 2023 which will limit future access to certain features and aspects of Sage Accounting software?