Excel 2007/2010 offers an option to save my files in an "Excel Binary Workbook" format that seems to be smaller (50% of the size in some cases) and load more quickly. Is there a downside to this format? Should I be avoiding it for some reason?
I'm thinking there has to be some shortcoming to it, or it would be the default save format instead of XLSX, but I can't figure out what the faults might be. XLSX seems to be reasonably common in other products that can import Excel files, but none of them support XLSB - why not?