I only write simple letters and, while I do actual accounting work in Excel which is just a little more than simple lists, I'm not using Excel as a database either... as I use databases for that (i.e. don't ask me how to do a VLOOKUP). Even in these simple tasks, MS Office is simply superior in terms of function and productivity if you are performing those simple tasks frequently enough.
Could I get by with LibreOffice or OpenOffice, yeah, and did so for a couple years straight and off/on before and after that time. I use to be annoyed to no end by the bloat and heaviness of MS Office... and then after prolonged use of LibreOffice/OpenOffice (yes, both), I came to greatly appreciate MS Office. The only part of office which I use regularly which I'm not very happy with is Outlook (OK, really only use Word, Excel, and Outlook... can't comment on the other parts of the suite as it's been more than a decade since I regularly used things like Access). I'm also disappointed by the Office 365 cloud integration/features: feels very much like a philosophical approach to technology that has lots of Microsoft servers in your enterprise's data center and the outside world is kept at bay rather than collaborated with... Google does that much better... LibreOffice not at all.
The number of quirks that caused something to not be quite right or the performance differences I experienced (noticeable in spreadsheets) makes free LibreOffice look very expensive and $99/yr MS Office look cheap. Much more productive in MS Office overall. Having managed IT operations in the corporate world, same experience there: the only place I would (and did) deploy OpenOffice (LibreOffice didn't exist yet) was to the field and the field being to retail chain store personnel. In the chain in question they only wrote simple letters and used spreadsheets for simple lists, generally had very little/no computer experience, and they didn't do office suite work with any regular frequency at all. In that case, the productivity hit was drowned out by the noise of overall lack of computer literacy and they didn't do those tasks with any real frequency, so the Office licenses really didn't make for good investment... but I can tell you that I deployed MS Office to all of the HQ staff and middle managers and glad to have done so.
In the past few years, I would probably rank the desktop office suites (meaning available for use on the desktop) as MS Office, G Suite, LIbreOffice. I have Office 365, but tend not to use the online versions of the apps so won't comment on them.