I once bought an Office 2016 license and when I installed it this year on a new laptop, it turned itself into a trimmed down O365. After the first Office update, I got a non-closable ad next to my Excel spreadsheet to upgrade to a full O365. Even more, I was only able to save files to OneDrive and not locally. That was not what I originally paid for!
It's fraud. Plain and simple.
Software as a Service is fraud
> I was only able to save files to OneDrive and not locally.
I find this very infuriating, and I've stopped using MS for more than 10 years now. They used to be a proper software company, with their flows, of course, but quite professional in the great scheme of things. But what you're describing goes against everything that I've valued as a computer programmer when I entered this field of work ~20 years ago.