My good advice is: it's hard for people with a compiled language background, including me, to accept that, but JS is very good for many things which we couldn't dream of 5 years ago, encroaching even C territory.
It may be a little tragic. Microsoft, may be hated, but it's still by far the best (or standard) office suite. We should actually be happy they're still selling the old standalone office without price hikes (Adobe don't seem to be doing that anymore with the Creative Suite). Heck, now they're freely offering almost fully functional multiplataform versions of office for phones and tablets. Nowadays, it's actually believable that some day they may actually release a working Office Suite for Linux.
Sure you can use Open/Libre Office and be happy with it for several purposes, but the small incompatibilities are surely gonna cause you serious trouble once you can't see properly the documents you need. Even iWork, actively developed by what is now the world's biggest private company, eventually gets broken by something and eventually many users install Office for their needs. For work or study purposes involving constant document exchange with users which you can't garantee will use the same tool as you, I still see dropping Office as no go, and it may be ever so. It's just like image editing: Gimp works fine for most personal projects but if you do it for a living, unless you're lucky and find an opensource haven nobody is gonna hire you don't use Adobe tools.
You're not coerced into using any of the optional cloud features if you don't want to give Microsoft your data. I for one, got one free office 365 license with a new computer and one from work, and the desktop version still works fine and, except for the 1TB onedrive which is useful, I haven't moved on and used it because I prefer the standalone version, and besides frequent upgrades which I will obviously miss, even some quite good cloud integration is available trough the bundled onedrive if that's your thing. Also, all questioning that sould sincerely check if their questioning behaviour with their Android or iOS phones is similar, which would surely make the complaints rational questioning of a huge powerful corporation, or whether it's just hate of Microsoft and love of Google or Apple, which have been doing much worse than Redmond.
Never buy what you do not want because it is cheap; it will be dear to you. -- Thomas Jefferson