That's a relief. Apple acquiring 1Password would torpedo any chance of getting a decent implementation on Windows. The implementation and integration on OS X are sublime, but Windows still leave a LOT to be desired.
The 1Password X extension works great on linux [1], including Chrome and Firefox.
We use the Teams feature with developers across macOS, Linux, and sometimes Windows. The web interface allows us to manage multiple password "vaults" in a single place, and those credentials are then easily accessible via the browser extension.
It's sometimes a bit funky in the update times though. I'll add a password or note and I'll have to wait till the next reboot or some other uncertain amount of time until I'm able to access that pass/note in 1Px
Still blows LastPass out the water even with that flaw.
I agree that 1Password on Windows has issues, but I feel like the developers got screwed by Microsoft on this one: they went all in on a UWP version, then had to throw all that out and basically start from square one when it became clear that UWP was a dead end. So I cut them some slack on that score. 1Password for Windows is improving, it's just taking a while (version 7 is a big step up, for example)
Last time I checked, about half of the windows market is running Windows 7 which doesn't support UWP. So UWP is a dead end for anyone who needs broad compatibility.