Syncthing isn't solving josephg's problem. When two people open an Excel or Google spreadsheet, both people can see the other's cursor position and edits in nea

Syncthing isn't solving josephg's problem. When two people open an Excel or Google spreadsheet, both people can see the other's cursor position and edits in near real-time. Both apps require buy-in to a singular, proprietary back-end (Excel's collaboration disappears in the file is outside of OneDrive). This is a "Mother of All Demos" level feature and people will suffer portability issues to keep it.