Unless, of course, you've found some portable version on the net that packs ThinApp and an assortment of old system libraries under the hood.
I have Office 2003 (or maybe it's 2007?) installed on my work computer, no problems. It even happily coexists with whatever modern Office version I have installed on there too.
I also have Office 2010 installed on my home computer and my husband uses it all the time. No issues.
Both computers are running Windows 10, so I guess it's not technically "the latest version."
There is a multi-dimensional community of people who deal with old software and old hardware. It has noticed that compatibility of Windows 10 with old versions of Office got worse in releases made in 2018. It seems that those old Office versions were finally removed from integration testing environments at that time.
Problems are different in different applications (Excel might be the most sensitive). Problems may depend on language version. Problems may only affect certain actions (say, crashing during spelling checks). Problems may depend on updates installed — and certain official updates were known to break some applications for some people even before that, so they certainly were not as thoroughly tested as regular ones.
It is great if everything works for you. It is also possible that your specific combination of COM objects and silently overloaded SxS libraries from multiple Office versions works, while some other combination wouldn't.
> I have Office 2003 (or maybe it's 2007?)
... is the stand out jaw-dropping moment.
I use Word 2003 for outline mode today, because for me, it's the final version that's usable. Word 2007 has the "Fluent UI" with a ribbon, making it unusable to me.
I boggled that someone might not notice what was a deal-breaking total UI change that drove me off a platform I'd been using for 19 years.
I don't use it day-to-day, but I have a few legacy "spreadsheets" (really small programs) from clients I have to work with once in a while that have macros that don't work right in modern office.
Sorry. I meant no offence.
There's a big difference -- at least for me -- between "I can't remember if it has the ribbon or not" (very surprising) and "I don't want the ribbon but I don't remember which version introduced it" (perfectly legit).
My apologies.