No. of Recommendations: 0
I have a lot of work invested in Excel, and am wondering whether Google Sheets are accessible from Excel.
Don't know, I haven't checked that out, interesting idea. What can be done is to upload Excel to Sheets. Most of the formulas and formats will automatically convert. The very advanced features of Excel (Addins, a minority of the high end formulas, things like that) will not automatically convert, nor will (I believe) pivot tables and charts. Those need rebuilding in Sheets.
Once in Sheets you have multiple sheets per workbook, you can reference ranges in other Sheets, webpage table & list content (if the site haven't occluded it with Javascript), import files directly, etc.
FC