Well, for me that's not weird, it's just a big fuck you, totally consistent with what other companies are doing. Multi-platform these days means Windows + OS X + Android + iOS. And the market I'm in is too small for them to bother, so might as well sit on that pile of cash and not want my business.
The weird part is that Linux is mostly about the server, being a really good home server for many people. And setting up a home server that synchronizes your files, for cheap with a Raspberry Pi and an external hard-drive, is a no-brainer. It's almost like they don't want people to do that.
But anyway, I'm voting with my wallet as they say. Currently paying €13.98/month for Dropbox, because I included the 1-year versioning add-on.
I also just gave up on 1Password for the same reason, even though I was happy with it on my Mac, switched to KeeWeb + Keepass2Android + MiniKeePass. In some ways it's even better - I now have a full history of all my edits and it can never switch on me or die.
1password keeps a history of edits, too. I don't know any way in which it's not a full history… hmm… maybe because they expose previous passwords, but if you change your username, they don't keep the old username unless it was a separate entry?
They are probably dogfooding the office suite that works fine in Chrome on Linux, and anything that's not a Doc/Sheet/presentation is source code under version control. I doubt they felt a pressing need for a desktop app supporting arbitrary kinds of files.
Which to me has always been kind of weird because Google uses Linux internally for most of their workstations.