For a long time Excel was/is the best (feature-wise, UI) spreadsheet program out there. Even if OO/LibreOffice or other F/OSS have duplicated most of the functi

For a long time Excel was/is the best (feature-wise, UI) spreadsheet program out there. Even if OO/LibreOffice or other F/OSS have duplicated most of the functionality, it still makes sense to get an actual licensed copy if you need it for business. To the grandparent poster, even if F/OSS is copying features, you still have the advantage of being first mover; it just means you have to keep updating and refining. There is also the non-trivial advantage in being paid to do this work. Moreover, if customers find it better to just switch from your product, incurring inevitable transfer costs, there is something wrong already.