It's not only a good thing for the end user, it's a good thing for Microsoft as well. It means a steady flow of subscriptions, steady flow of revenue, and a steady flow of updates as well for the end user. Office 2013 users didn't get a new feature in Excel recently with the SP1 update. Office 365 users did.
Also, if you just need Word and Excel, Office Online is the best and free alternative to use. Just need a Microsoft Account, you're all set.