I think anything is a great alternative to the Office at this point. In hindsight, LibreOffice's name must've been chosen by a fortune-teller..or a <strike>pessimist</strike> realist ;)
I'd rather just pay one cost and use the product.
Retail Office gets updated about every three years. That's plenty, buying a subscription for Word seems hardly worth it.
The value-add here is that Office comes with cloud storage, really great built-in sync, and a continuous stream of improvement. Amazingly, Office is still getting better, but now improvements are released by the month, not every 3-4 years.