Pretty much yes. My mom runs up-to-date Ubuntu on an IBM desktop that's older than Windows Vista.

If it's Windows or Linux, then probably (hardware reqs haven't changed since 2010). Mac you're probably out of luck unless you use Wine.

Or pay a vendor to maintain it for you - I know Collabora will maintain versions of any age if you pay them to do so. May be cheaper to run a newer version for free and upgrade hardware/OS as needed, if you're insisting on the Mac version anyway.

You're not doing well on the rhetorical questions here ...