Just as I was getting to like the new categories in gMail's In Box, they've disappeared. I was happily using them at work, but when I opened up my laptop at home, they weren't there, and neither was the setting to enable them. I've tried signing out and back in again, but to no avail. I can't remember, but it's possible that my home laptop has been signed in but unused since before I got the option to use them, as I often use my phone/tablet at home for email.
And because the categories aren't enabled on the desktop, they're no longer there on my Android devices either.
Have I missed something?