Nothing wrong with that. Windows XP-64 supports up to 128GB physical RAM, could be 5 years until that is available on laptops. Windows 7 Pro supports up to 192 GB of RAM. Now if you were to ask me what you would run on those systems with maxed out RAM, I wouldn't know. I also don't think the Excel version that runs on those versions of windows allows partially filled cells for Gantt charts.