Mostly just games
Their sponsors (people who actually give them money to develop) seem mostly to be interested in games, so that's where the attention goes.
Things that you might actually use for something other than wasting time (e.g.: TurboTax, a version of Photoshop released this decade) don't get a lot of love. It's not really their fault -- a person has to eat -- but it limits the utility of the project from an end-user perspective. If you want that to change, you have to pony up.
I'm betting that most people's Office needs are satisfied by Libre Office, so MS Office support -- a delightful technical achievement -- doesn't actually open any productivity doors.
Note also that it's important to actually read through the ratings. Things are sometimes rated "Silver" or "Bronze" if the applications launch, but are otherwise unable to do what they were designed for.