Exactly. Buy a stand alone version for £100-150 and you have it. For keeps.
Subscribe to their poxy 365 and you'll pay that every fucking year for the same thing.
Get LibreOffice if you can use it in your environment. FREE.
I will never buy a subscription. If anything prevents me using my Office 2010 I'll just use LO. I only stuck with MSOffice because I used to be tied to Outlook. And now I stick with it because it's on this PC. On my others it's LO all the way. (And PaleMoon with Lightning for my diary - pity LO hasn't got a diary or note component to replace Outlook and Onenote/Evernote)