Google docs gets you 99% of the way there so long as you are doing a simple task, like a simple data table or a simple letter. For simple tasks it’s very user friendly and efficient. But it lacks features to do anything more complicated than that.
It is possible you will never use these functions, but the entire professional world runs on excel sheets and registers (even though there is probably a tool somewhere that would work better for individual use cases). The universal compatibility is very valuable and the cost is negligible for businesses.