google docs and sheets have 99% of the features that an average home user would want to use for a word processor and a spreadsheet.
The things that docs don't have are things like templated designs, and other typesetting features that a professional document creator would want to use. It also isn't completely compatible with office document formats (some formatting and alignments are wrong). I would imagine similar with spreadsheets.
Uhm. You probably haven't seen the crazy Google sheets that exist out there.
They are really stretching what you should be doing with a spreadsheet and they are fully collaborative/multi-user. At some point it got really old to wait fifteen minutes for the sheets to recalculate.
The things that docs don't have are things like templated designs, and other typesetting features that a professional document creator would want to use. It also isn't completely compatible with office document formats (some formatting and alignments are wrong). I would imagine similar with spreadsheets.