Tried it for a small non-profit and shared your finding that a well-made spreadsheet is just as good if not better. But a larger company would've quickly hit a

Tried it for a small non-profit and shared your finding that a well-made spreadsheet is just as good if not better. But a larger company would've quickly hit a regulatory wall as well, not just a technical one. For accounting software to be legal under our tax laws it needs to prevent you from doing things that are illegal (back-dating, editing, deleting...) and it needs to have a technical study done to prove that. Such a study is of course expensive and must be commissioned by the vendor. You can imagine how that just isn't possible for GNU Cash and similar community-built programs.