My mom is happy with LibreOffice. For myself, I try it every few years (usually when there's some big announcement) to see if it's improved. There's some kind of latency in the UI that makes it laborious, if not painful, to use. And recalculating a large spreadsheet, or reformatting a graph, takes an eon. I found that out when trying to graph data sets with thousands of rows. Now I use Python.

This may be a place where the major paid apps still have an advantage. I think that MS sweats the details of Office the way that Apple sweats the details of the iPhone, and it's laborious work that can only be done by hiring a huge army of programmers and paying them a lot.