I have to use MS products at work and use Collabora (on Linux) at home. Sometimes, I have to edit the same spreadsheet at home and at work and that usually works flawlessly, besides automatic coloring. Now, I also don't try to code in Excel, so that might be one reason. Excel graphs are also nicer.

Here is a comparison by the Document Foundation for spreadsheets [1]. I think it speaks for itself.

Regarding Powerpoint I can't say. I can't recall when I last used Powerpoint for anything. We have an in-house system where I just select slide type, enter my text and attach pictures in a form and it builds a CI-styled PDF for me. I think its basically a LaTeX front-end, but I never cared.

HTH

[1] https://wiki.documentfoundation.org/Feature_Comparison:_Libr...