In rapidly moving
towards a SaaS (Software as a Service) model, there will be some real challenges for firms that are still
operating with
older and sometimes unsupported versions of various applications, but also functioning under earlier releases of Windows and other
operating systems, As new features and functions are added, they may only work on the most current version of the OS and so there may well be additional costs in first upgrading the OS to take advantage of updated or completely new apps — particularly, as support starts diminishing for outdated OS.